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Forensic science, also known as criminalistics, is the application of
science Science is a systematic endeavor that builds and organizes knowledge in the form of testable explanations and predictions about the universe. Science may be as old as the human species, and some of the earliest archeological evidence ...
to
criminal In ordinary language, a crime is an unlawful act punishable by a state or other authority. The term ''crime'' does not, in modern criminal law, have any simple and universally accepted definition,Farmer, Lindsay: "Crime, definitions of", in C ...
and civil laws, mainly—on the criminal side—during
criminal investigation Criminal investigation is an applied science that involves the study of facts that are then used to inform criminal trials. A complete criminal investigation can include searching, interviews, interrogations, evidence collection and preservat ...
, as governed by the legal standards of
admissible evidence Admissible evidence, in a court of law, is any testimonial, documentary, or tangible evidence that may be introduced to a factfinder—usually a judge or jury—to establish or to bolster a point put forth by a party to the proceeding. For ...
and
criminal procedure Criminal procedure is the adjudication process of the criminal law. While criminal procedure differs dramatically by jurisdiction, the process generally begins with a formal criminal charge with the person on trial either being free on bail o ...
. Forensic science is a broad field that includes; DNA analysis, fingerprint analysis, blood stain pattern analysis, firearms examination and ballistics, tool mark analysis, serology, toxicology, hair and fiber analysis, entomology, questioned documents, anthropology, odontology, pathology, epidemiology, footwear and tire tread analysis, drug chemistry, paint and glass analysis, digital audio video and photo analysis. Forensic scientists collect, preserve, and analyze scientific
evidence Evidence for a proposition is what supports this proposition. It is usually understood as an indication that the supported proposition is true. What role evidence plays and how it is conceived varies from field to field. In epistemology, evidenc ...
during the course of an investigation. While some forensic scientists travel to the scene of the crime to collect the evidence themselves, others occupy a laboratory role, performing analysis on objects brought to them by other individuals. Still others are involved in analysis of financial, banking, or other numerical data for use in financial crime investigation, and can be employed as consultants from private firms, academia, or as government employees. In addition to their laboratory role, forensic scientists testify as
expert witness An expert witness, particularly in common law countries such as the United Kingdom, Australia, and the United States, is a person whose opinion by virtue of education, training, certification, skills or experience, is accepted by the judge as ...
es in both criminal and civil cases and can work for either the
prosecution A prosecutor is a legal representative of the prosecution in states with either the common law adversarial system or the Civil law (legal system), civil law inquisitorial system. The prosecution is the legal party responsible for presenting the ...
or the defense. While any field could technically be ''forensic'', certain sections have developed over time to encompass the majority of forensically related cases.


Etymology

The word ''forensic'' comes from the Latin term ', meaning "of or before the forum". The history of the term originates in Roman times, when a criminal charge meant presenting the case before a group of public individuals in the forum. Both the person accused of the crime and the accuser would give speeches based on their sides of the story. The case would be decided in favor of the individual with the best argument and delivery. This origin is the source of the two modern usages of the word ''forensic''—as a form of legal evidence; and as a category of public presentation. In modern use, the term ''forensics'' is often used in place of "forensic science." The word "science", is derived from the Latin word for 'knowledge' and is today closely tied to the scientific method, a systematic way of acquiring knowledge. Taken together, forensic science means the use of the scientific methods and processes for crime solving.


History


Origins of forensic science and early methods

The ancient world lacked standardized forensic practices, which enabled criminals to escape punishment. Criminal investigations and trials relied heavily on forced confessions and witness
testimony In law and in religion, testimony is a solemn attestation as to the truth of a matter. Etymology The words "testimony" and "testify" both derive from the Latin word ''testis'', referring to the notion of a disinterested third-party witness. ...
. However, ancient sources do contain several accounts of techniques that foreshadow concepts in forensic science developed centuries later. The first written account of using
medicine Medicine is the science and practice of caring for a patient, managing the diagnosis, prognosis, prevention, treatment, palliation of their injury or disease, and promoting their health. Medicine encompasses a variety of health care pr ...
and
entomology Entomology () is the scientific study of insects, a branch of zoology. In the past the term "insect" was less specific, and historically the definition of entomology would also include the study of animals in other arthropod groups, such as ara ...
to solve criminal cases is attributed to the book of ''Xi Yuan Lu'' (translated as ''Washing Away of Wrongs''), written in China in 1248 by
Song Ci Song Ci (; 1186–1249) was a Chinese physician, judge, forensic medical scientist, anthropologist, and writer of the Southern Song dynasty. He is most well known for being the world's first forensic entomologist, having recorded his experien ...
(宋慈, 1186–1249), a director of justice, jail and supervision, during the
Song dynasty The Song dynasty (; ; 960–1279) was an imperial dynasty of China that began in 960 and lasted until 1279. The dynasty was founded by Emperor Taizu of Song following his usurpation of the throne of the Later Zhou. The Song conquered the res ...
. Song Ci introduced regulations concerning autopsy reports to court, how to protect the evidence in the examining process, and explained why forensic workers must demonstrate impartiality to the public. He devised methods for making antiseptic and for promoting the reappearance of hidden injuries to dead bodies and bones (using sunlight and vinegar under a red-oil umbrella); for calculating the time of death (allowing for weather and insect activity); described how to wash and examine the dead body to ascertain the reason for death. At that time the book had described methods for distinguishing between suicide and faked suicide. In one of Song Ci's accounts (''Washing Away of Wrongs''), the case of a person murdered with a sickle was solved by an investigator who instructed each suspect to bring his sickle to one location. (He realized it was a sickle by testing various blades on an animal carcass and comparing the wounds.) Flies, attracted by the smell of blood, eventually gathered on a single sickle. In light of this, the owner of that sickle confessed to the murder. The book also described how to distinguish between a
drowning Drowning is a type of suffocation induced by the submersion of the mouth and nose in a liquid. Most instances of fatal drowning occur alone or in situations where others present are either unaware of the victim's situation or unable to offer as ...
(water in the
lungs The lungs are the primary organs of the respiratory system in humans and most other animals, including some snails and a small number of fish. In mammals and most other vertebrates, two lungs are located near the backbone on either si ...
) and
strangulation Strangling is compression of the neck that may lead to unconsciousness or death by causing an increasingly hypoxic state in the brain. Fatal strangling typically occurs in cases of violence, accidents, and is one of two main ways that hangin ...
(broken neck
cartilage Cartilage is a resilient and smooth type of connective tissue. In tetrapods, it covers and protects the ends of long bones at the joints as articular cartilage, and is a structural component of many body parts including the rib cage, the neck ...
), and described evidence from examining corpses to determine if a death was caused by murder, suicide or accident. Methods from around the world involved saliva and examination of the mouth and tongue to determine innocence or guilt, as a precursor to the
Polygraph test A polygraph, often incorrectly referred to as a lie detector test, is a device or procedure that measures and records several physiological indicators such as blood pressure, pulse, respiration, and skin conductivity while a person is asked an ...
. In ancient India, some suspects were made to fill their mouths with dried rice and spit it back out. Similarly, in ancient
China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's List of countries and dependencies by population, most populous country, with a Population of China, population exceeding 1.4 billion, slig ...
, those accused of a crime would have rice powder placed in their mouths. In ancient middle-eastern cultures, the accused were made to lick hot metal rods briefly. It is thought that these tests had some validity since a guilty person would produce less saliva and thus have a drier mouth; the accused would be considered guilty if rice was sticking to their mouths in abundance or if their tongues were severely burned due to lack of shielding from saliva.


Development of forensic science

In 16th-century Europe, medical practitioners in army and university settings began to gather information on the cause and
manner of death In many legal jurisdictions, the manner of death is a determination, typically made by the coroner, medical examiner, police, or similar officials, and recorded as a vital statistic. Within the United States and the United Kingdom, a distinc ...
.
Ambroise Paré Ambroise Paré (c. 1510 – 20 December 1590) was a French barber surgeon who served in that role for kings Henry II, Francis II, Charles IX and Henry III. He is considered one of the fathers of surgery and modern forensic pathology and a pi ...
, a French army
surgeon In modern medicine, a surgeon is a medical professional who performs surgery. Although there are different traditions in different times and places, a modern surgeon usually is also a licensed physician or received the same medical training as ...
, systematically studied the effects of violent death on internal organs. Two Italian surgeons, Fortunato Fidelis and Paolo Zacchia, laid the foundation of modern
pathology Pathology is the study of the causes and effects of disease or injury. The word ''pathology'' also refers to the study of disease in general, incorporating a wide range of biology research fields and medical practices. However, when used in ...
by studying changes that occurred in the structure of the body as the result of disease. In the late 18th century, writings on these topics began to appear. These included ''A Treatise on Forensic Medicine and Public Health'' by the French physician Francois Immanuele Fodéré and ''The Complete System of Police Medicine'' by the German medical expert Johann Peter Frank. As the rational values of the
Enlightenment era The Age of Enlightenment or the Enlightenment; german: Aufklärung, "Enlightenment"; it, L'Illuminismo, "Enlightenment"; pl, Oświecenie, "Enlightenment"; pt, Iluminismo, "Enlightenment"; es, La Ilustración, "Enlightenment" was an intel ...
increasingly permeated society in the 18th century, criminal investigation became a more evidence-based, rational procedure − the use of torture to force confessions was curtailed, and belief in witchcraft and other powers of the
occult The occult, in the broadest sense, is a category of esoteric supernatural beliefs and practices which generally fall outside the scope of religion and science, encompassing phenomena involving otherworldly agency, such as magic and mysticism a ...
largely ceased to influence the court's decisions. Two examples of English forensic science in individual legal proceedings demonstrate the increasing use of
logic Logic is the study of correct reasoning. It includes both formal and informal logic. Formal logic is the science of deductively valid inferences or of logical truths. It is a formal science investigating how conclusions follow from prem ...
and procedure in criminal investigations at the time. In 1784, in Lancaster, John Toms was tried and convicted for murdering Edward Culshaw with a
pistol A pistol is a handgun, more specifically one with the chamber integral to its gun barrel, though in common usage the two terms are often used interchangeably. The English word was introduced in , when early handguns were produced in Europe, a ...
. When the dead body of Culshaw was examined, a pistol wad (crushed paper used to secure powder and balls in the muzzle) found in his head wound matched perfectly with a torn newspaper found in Toms's pocket, leading to the conviction. In
Warwick Warwick ( ) is a market town, civil parish and the county town of Warwickshire in the Warwick District in England, adjacent to the River Avon, Warwickshire, River Avon. It is south of Coventry, and south-east of Birmingham. It is adjoined wit ...
1816, a farm laborer was tried and convicted of the murder of a young maidservant. She had been drowned in a shallow pool and bore the marks of violent assault. The police found footprints and an impression from corduroy cloth with a sewn patch in the damp earth near the pool. There were also scattered grains of
wheat Wheat is a grass widely cultivated for its seed, a cereal grain that is a worldwide staple food. The many species of wheat together make up the genus ''Triticum'' ; the most widely grown is common wheat (''T. aestivum''). The archaeologi ...
and chaff. The breeches of a farm labourer who had been threshing wheat nearby were examined and corresponded exactly to the impression in the earth near the pool. An article appearing in
Scientific American ''Scientific American'', informally abbreviated ''SciAm'' or sometimes ''SA'', is an American popular science magazine. Many famous scientists, including Albert Einstein and Nikola Tesla, have contributed articles to it. In print since 1845, it ...
in 1885 describes the use of microscopy to distinguish between the blood of two persons in a criminal case in Chicago.


Toxicology

A method for detecting arsenious oxide, simple
arsenic Arsenic is a chemical element with the symbol As and atomic number 33. Arsenic occurs in many minerals, usually in combination with sulfur and metals, but also as a pure elemental crystal. Arsenic is a metalloid. It has various allotropes, b ...
, in corpses was devised in 1773 by the Swedish chemist,
Carl Wilhelm Scheele Carl Wilhelm Scheele (, ; 9 December 1742 – 21 May 1786) was a Swedish German pharmaceutical chemist. Scheele discovered oxygen (although Joseph Priestley published his findings first), and identified molybdenum, tungsten, barium, hydr ...
. His work was expanded upon, in 1806, by German chemist Valentin Ross, who learned to detect the poison in the walls of a victim's stomach. James Marsh was the first to apply this new science to the art of forensics. He was called by the prosecution in a murder trial to give evidence as a chemist in 1832. The defendant, John Bodle, was accused of poisoning his grandfather with arsenic-laced coffee. Marsh performed the standard test by mixing a suspected sample with
hydrogen sulfide Hydrogen sulfide is a chemical compound with the formula . It is a colorless chalcogen-hydride gas, and is poisonous, corrosive, and flammable, with trace amounts in ambient atmosphere having a characteristic foul odor of rotten eggs. The under ...
and
hydrochloric acid Hydrochloric acid, also known as muriatic acid, is an aqueous solution of hydrogen chloride. It is a colorless solution with a distinctive pungent smell. It is classified as a strong acid. It is a component of the gastric acid in the dige ...
. While he was able to detect arsenic as yellow arsenic trisulfide, when it was shown to the jury it had deteriorated, allowing the suspect to be acquitted due to reasonable doubt. Annoyed by that, Marsh developed a much better test. He combined a sample containing arsenic with
sulfuric acid Sulfuric acid (American spelling and the preferred IUPAC name) or sulphuric acid ( Commonwealth spelling), known in antiquity as oil of vitriol, is a mineral acid composed of the elements sulfur, oxygen and hydrogen, with the molecular fo ...
and arsenic-free
zinc Zinc is a chemical element with the symbol Zn and atomic number 30. Zinc is a slightly brittle metal at room temperature and has a shiny-greyish appearance when oxidation is removed. It is the first element in group 12 (IIB) of the periodi ...
, resulting in
arsine Arsine (IUPAC name: arsane) is an inorganic compound with the formula As H3. This flammable, pyrophoric, and highly toxic pnictogen hydride gas is one of the simplest compounds of arsenic. Despite its lethality, it finds some applications ...
gas. The gas was ignited, and it decomposed to pure metallic arsenic, which, when passed to a cold surface, would appear as a silvery-black deposit. So sensitive was the test, known formally as the
Marsh test The Marsh test is a highly sensitive method in the detection of arsenic, especially useful in the field of forensic toxicology when arsenic was used as a poison. It was developed by the chemist James Marsh and first published in 1836. The met ...
, that it could detect as little as one-fiftieth of a milligram of arsenic. He first described this test in ''The Edinburgh Philosophical Journal'' in 1836.


Ballistics

Henry Goddard at
Scotland Yard Scotland Yard (officially New Scotland Yard) is the headquarters of the Metropolitan Police, the territorial police force responsible for policing Greater London's 32 boroughs, but not the City of London, the square mile that forms London's ...
pioneered the use of bullet comparison in 1835. He noticed a flaw in the bullet that killed the victim and was able to trace this back to the mold that was used in the manufacturing process.


Anthropometry

The French police officer
Alphonse Bertillon Alphonse Bertillon (; 22 April 1853 – 13 February 1914) was a French police officer and biometrics researcher who applied the anthropological technique of anthropometry to law enforcement creating an identification system based on physical me ...
was the first to apply the anthropological technique of
anthropometry Anthropometry () refers to the measurement of the human individual. An early tool of physical anthropology, it has been used for identification, for the purposes of understanding human physical variation, in paleoanthropology and in various atte ...
to law enforcement, thereby creating an identification system based on physical measurements. Before that time, criminals could be identified only by name or photograph.Kirsten Moana Thompson, ''Crime Films: Investigating the Scene''. London: Wallflower Press (2007): 10 Dissatisfied with the ''ad hoc'' methods used to identify captured criminals in France in the 1870s, he began his work on developing a reliable system of anthropometrics for human classification. Bertillon created many other
forensics Forensic science, also known as criminalistics, is the application of science to criminal and civil laws, mainly—on the criminal side—during criminal investigation, as governed by the legal standards of admissible evidence and crimin ...
techniques, including forensic document examination, the use of galvanoplastic compounds to preserve footprints,
ballistics Ballistics is the field of mechanics concerned with the launching, flight behaviour and impact effects of projectiles, especially ranged weapon munitions such as bullets, unguided bombs, rockets or the like; the science or art of designing a ...
, and the
dynamometer A dynamometer or "dyno" for short, is a device for simultaneously measuring the torque and rotational speed ( RPM) of an engine, motor or other rotating prime mover so that its instantaneous power may be calculated, and usually displayed by ...
, used to determine the degree of force used in breaking and entering. Although his central methods were soon to be supplanted by
fingerprinting A fingerprint is an impression left by the friction ridges of a human finger. The recovery of partial fingerprints from a crime scene is an important method of forensic science. Moisture and grease on a finger result in fingerprints on surfac ...
, "his other contributions like the
mug shot A mug shot or mugshot (an informal term for police photograph or booking photograph) is a photographic portrait of a person from the shoulders up, typically taken after a person is arrested. The original purpose of the mug shot was to allow law ...
and the systematization of crime-scene photography remain in place to this day."


Fingerprints

Sir
William Herschel Frederick William Herschel (; german: Friedrich Wilhelm Herschel; 15 November 1738 – 25 August 1822) was a German-born British astronomer and composer. He frequently collaborated with his younger sister and fellow astronomer Caroline ...
was one of the first to advocate the use of fingerprinting in the identification of criminal suspects. While working for the
Indian Civil Service The Indian Civil Service (ICS), officially known as the Imperial Civil Service, was the higher civil service of the British Empire in India during British rule in the period between 1858 and 1947. Its members ruled over more than 300 million p ...
, he began to use thumbprints on documents as a security measure to prevent the then-rampant repudiation of signatures in 1858. In 1877 at Hooghly (near Kolkata), Herschel instituted the use of fingerprints on contracts and deeds, and he registered government pensioners' fingerprints to prevent the collection of money by relatives after a pensioner's death. In 1880, Dr.
Henry Faulds Henry Faulds (1 June 1843 – 24 March 1930) was a Scottish doctor, missionary and scientist who is noted for the development of fingerprinting. Early life Faulds was born in Beith, North Ayrshire, into a family of modest means. Aged 13, he wa ...
, a Scottish surgeon in a
Tokyo Tokyo (; ja, 東京, , ), officially the Tokyo Metropolis ( ja, 東京都, label=none, ), is the capital and largest city of Japan. Formerly known as Edo, its metropolitan area () is the most populous in the world, with an estimated 37.46 ...
hospital, published his first paper on the subject in the scientific journal ''
Nature Nature, in the broadest sense, is the physical world or universe. "Nature" can refer to the phenomena of the physical world, and also to life in general. The study of nature is a large, if not the only, part of science. Although humans are ...
'', discussing the usefulness of fingerprints for identification and proposing a method to record them with printing ink. He established their first classification and was also the first to identify fingerprints left on a vial. Returning to the UK in 1886, he offered the concept to the
Metropolitan Police The Metropolitan Police Service (MPS), formerly and still commonly known as the Metropolitan Police (and informally as the Met Police, the Met, Scotland Yard, or the Yard), is the territorial police force responsible for law enforcement and ...
in London, but it was dismissed at that time. See also this on-line article on Henry Faulds: Faulds wrote to
Charles Darwin Charles Robert Darwin ( ; 12 February 1809 – 19 April 1882) was an English naturalist, geologist, and biologist, widely known for his contributions to evolutionary biology. His proposition that all species of life have descended ...
with a description of his method, but, too old and ill to work on it, Darwin gave the information to his cousin,
Francis Galton Sir Francis Galton, FRS FRAI (; 16 February 1822 – 17 January 1911), was an English Victorian era polymath: a statistician, sociologist, psychologist, Anthropology, anthropologist, tropical Exploration, explorer, geographer, Inventio ...
, who was interested in anthropology. Having been thus inspired to study fingerprints for ten years, Galton published a detailed statistical model of fingerprint analysis and identification and encouraged its use in forensic science in his book ''Finger Prints''. He had calculated that the chance of a "false positive" (two different individuals having the same fingerprints) was about 1 in 64 billion. Juan Vucetich, an Argentine chief police officer, created the first method of recording the fingerprints of individuals on file. In 1892, after studying Galton's pattern types, Vucetich set up the world's first fingerprint bureau. In that same year, Francisca Rojas of Necochea was found in a house with neck injuries whilst her two sons were found dead with their throats cut. Rojas accused a neighbour, but despite brutal interrogation, this neighbour would not confess to the crimes. Inspector Alvarez, a colleague of Vucetich, went to the scene and found a bloody thumb mark on a door. When it was compared with Rojas' prints, it was found to be identical with her right thumb. She then confessed to the murder of her sons. A Fingerprint Bureau was established in Calcutta (
Kolkata Kolkata (, or , ; also known as Calcutta , the official name until 2001) is the capital of the Indian state of West Bengal, on the eastern bank of the Hooghly River west of the border with Bangladesh. It is the primary business, comme ...
), India, in 1897, after the Council of the Governor General approved a committee report that fingerprints should be used for the classification of criminal records. Working in the Calcutta Anthropometric Bureau, before it became the Fingerprint Bureau, were Azizul Haque and Hem Chandra Bose. Haque and Bose were Indian fingerprint experts who have been credited with the primary development of a fingerprint classification system eventually named after their supervisor, Sir Edward Richard Henry. The Henry Classification System, co-devised by Haque and Bose, was accepted in England and Wales when the first United Kingdom Fingerprint Bureau was founded in
Scotland Yard Scotland Yard (officially New Scotland Yard) is the headquarters of the Metropolitan Police, the territorial police force responsible for policing Greater London's 32 boroughs, but not the City of London, the square mile that forms London's ...
, the
Metropolitan Police The Metropolitan Police Service (MPS), formerly and still commonly known as the Metropolitan Police (and informally as the Met Police, the Met, Scotland Yard, or the Yard), is the territorial police force responsible for law enforcement and ...
headquarters, London, in 1901. Sir Edward Richard Henry subsequently achieved improvements in dactyloscopy. In the United States, Dr. Henry P. DeForrest used fingerprinting in the New York Civil Service in 1902, and by December 1905,
New York City Police Department The New York City Police Department (NYPD), officially the City of New York Police Department, established on May 23, 1845, is the primary municipal law enforcement Law enforcement is the activity of some members of government who act i ...
Deputy Commissioner Joseph A. Faurot, an expert in the Bertillon system and a fingerprint advocate at Police Headquarters, introduced the fingerprinting of criminals to the United States.


Uhlenhuth test

The
Uhlenhuth test The Uhlenhuth test, also referred to as the antigen–antibody precipitin test for species, is a test which can determine the species of a blood sample. It was invented by Paul Uhlenhuth in 1901, based on the discovery that the blood of different s ...
, or the antigen–antibody
precipitin A precipitin is an antibody which can precipitate out of a solution upon antigen binding. Precipitin reaction The precipitin reaction provided the first quantitative assay for antibody. The precipitin reaction is based upon the interaction of anti ...
test for species, was invented by
Paul Uhlenhuth Paul Theodor Uhlenhuth (7 January 1870 in Hanover – 13 December 1957 in Freiburg im Breisgau) was a German bacteriologist and immunologist, and Professor at the University of Strasbourg (1911–1918), at the University of Marburg (1918–1923 ...
in 1901 and could distinguish human
blood Blood is a body fluid in the circulatory system of humans and other vertebrates that delivers necessary substances such as nutrients and oxygen to the cells, and transports metabolic waste products away from those same cells. Blood in the cir ...
from animal blood, based on the discovery that the blood of different species had one or more characteristic proteins. The test represented a major breakthrough and came to have tremendous importance in forensic science. The test was further refined for forensic use by the Swiss chemist Maurice Müller in the year 1960s.


DNA

Forensic
DNA analysis Genetic testing, also known as DNA testing, is used to identify changes in DNA sequence or chromosome structure. Genetic testing can also include measuring the results of genetic changes, such as RNA analysis as an output of gene expression, or ...
was first used in 1984. It was developed by Sir
Alec Jeffreys Sir Alec John Jeffreys, (born 9 January 1950) is a British geneticist known for developing techniques for genetic fingerprinting and DNA profiling which are now used worldwide in forensic science to assist police detective work and to resolve ...
, who realized that variation in the genetic sequence could be used to identify individuals and to tell individuals apart from one another. The first application of DNA profiles was used by Jefferys in a double murder mystery in the small English town of
Narborough, Leicestershire Narborough is a large village and civil parish in the Blaby district of Leicestershire, England, around southwest of Leicester. The population of the civil parish (including Littlethorpe) was 8,498. The name is derived from the Old English ' ...
, in 1985. A 15-year-old school girl by the name of Lynda Mann was raped and murdered in Carlton Hayes psychiatric hospital. The police did not find a suspect but were able to obtain a semen sample. In 1986, Dawn Ashworth, 15 years old, was also raped and strangled in the nearby village of Enderby. Forensic evidence showed that both killers had the same blood type. Richard Buckland became the suspect because he worked at Carlton Hayes psychiatric hospital, had been spotted near Dawn Ashworth's murder scene and knew unreleased details about the body. He later confessed to Dawn's murder but not Lynda's. Jefferys was brought into the case to analyze the semen samples. He concluded that there was no match between the samples and Buckland, who became the first person to be exonerated using DNA. Jefferys confirmed that the DNA profiles were identical for the two murder semen samples. To find the perpetrator, DNA samples from the entire male population, more than 4,000 aged from 17 to 34, of the town were collected. They all were compared to semen samples from the crime. A friend of Colin Pitchfork was heard saying that he had given his sample to the police claiming to be Colin. Colin Pitchfork was arrested in 1987 and it was found that his DNA profile matched the semen samples from the murder. Because of this case, DNA databases were developed. There is the national (FBI) and international databases as well as the European countries (ENFSI : European Network of Forensic Science Institutes). These searchable databases are used to match crime scene DNA profiles to those already in a database.


Maturation

By the turn of the 20th century, the science of forensics had become largely established in the sphere of criminal investigation. Scientific and surgical investigation was widely employed by the
Metropolitan Police The Metropolitan Police Service (MPS), formerly and still commonly known as the Metropolitan Police (and informally as the Met Police, the Met, Scotland Yard, or the Yard), is the territorial police force responsible for law enforcement and ...
during their pursuit of the mysterious
Jack the Ripper Jack the Ripper was an unidentified serial killer active in and around the impoverished Whitechapel district of London, England, in the autumn of 1888. In both criminal case files and the contemporaneous journalistic accounts, the killer w ...
, who had killed a number of women in the 1880s. This case is a watershed in the application of forensic science. Large teams of policemen conducted house-to-house inquiries throughout Whitechapel. Forensic material was collected and examined. Suspects were identified, traced and either examined more closely or eliminated from the inquiry. Police work follows the same pattern today. Canter, David (1994), ''Criminal Shadows: Inside the Mind of the Serial Killer'', London: HarperCollins, pp. 12–13, Over 2000 people were interviewed, "upwards of 300" people were investigated, and 80 people were detained. The investigation was initially conducted by the
Criminal Investigation Department The Criminal Investigation Department (CID) is the branch of a police force to which most plainclothes detectives belong in the United Kingdom and many Commonwealth nations. A force's CID is distinct from its Special Branch (though officers of b ...
(CID), headed by Detective Inspector
Edmund Reid Detective Inspector Edmund John James Reid (21 March 1846 – 5 December 1917) was the head of the CID in the Metropolitan Police's H Division at the time of the Whitechapel murders of Jack the Ripper in 1888. He was also an early aeronaut. ...
. Later, Detective Inspectors
Frederick Abberline Frederick George Abberline (8 January 1843 – 10 December 1929) was a British chief inspector for the London Metropolitan Police. He is best known for being a prominent police figure in the investigation into the Jack the Ripper serial killer ...
,
Henry Moore Henry Spencer Moore (30 July 1898 – 31 August 1986) was an English artist. He is best known for his semi-abstract art, abstract monumental bronze sculptures which are located around the world as public works of art. As well as sculpture, Mo ...
, and Walter Andrews were sent from Central Office at
Scotland Yard Scotland Yard (officially New Scotland Yard) is the headquarters of the Metropolitan Police, the territorial police force responsible for policing Greater London's 32 boroughs, but not the City of London, the square mile that forms London's ...
to assist. Initially, butchers, surgeons and physicians were suspected because of the manner of the mutilations. The alibis of local butchers and slaughterers were investigated, with the result that they were eliminated from the inquiry. Some contemporary figures thought the pattern of the murders indicated that the culprit was a butcher or cattle drover on one of the cattle boats that plied between London and mainland Europe. Whitechapel was close to the
London Docks London Docklands is the riverfront and former docks in London. It is located in inner east and southeast London, in the boroughs of Southwark, Tower Hamlets, Lewisham, Newham, and Greenwich. The docks were formerly part of the Port ...
, and usually such boats docked on Thursday or Friday and departed on Saturday or Sunday. The cattle boats were examined, but the dates of the murders did not coincide with a single boat's movements, and the transfer of a crewman between boats was also ruled out. At the end of October, Robert Anderson asked police surgeon Thomas Bond to give his opinion on the extent of the murderer's surgical skill and knowledge. The opinion offered by Bond on the character of the "Whitechapel murderer" is the earliest surviving offender profile.Canter, pp. 5–6 Bond's assessment was based on his own examination of the most extensively mutilated victim and the
post mortem An autopsy (post-mortem examination, obduction, necropsy, or autopsia cadaverum) is a surgical procedure that consists of a thorough examination of a corpse by dissection to determine the cause, mode, and manner of death or to evaluate any d ...
notes from the four previous canonical murders.Letter from Thomas Bond to Robert Anderson, 1888, HO 144/221/A49301C, quoted in Evans and Skinner, ''The Ultimate Jack the Ripper Sourcebook'', pp. 360–362 and Rumbelow, pp. 145–147 In his opinion the killer must have been a man of solitary habits, subject to "periodical attacks of homicidal and erotic
mania Mania, also known as manic syndrome, is a mental and behavioral disorder defined as a state of abnormally elevated arousal, affect, and energy level, or "a state of heightened overall activation with enhanced affective expression together wi ...
", with the character of the mutilations possibly indicating "
satyriasis Hypersexuality is extremely frequent or suddenly increased libido. It is controversial whether it should be included as a clinical diagnosis used by mental healthcare professionals. Nymphomania and satyriasis were terms previously used for the c ...
". Bond also stated that "the homicidal impulse may have developed from a revengeful or brooding condition of the mind, or that religious mania may have been the original disease but I do not think either hypothesis is likely". ''Handbook for Coroners, police officials, military policemen'' was written by the
Austrian Austrian may refer to: * Austrians, someone from Austria or of Austrian descent ** Someone who is considered an Austrian citizen, see Austrian nationality law * Austrian German dialect * Something associated with the country Austria, for example: ...
criminal jurist Hans Gross in 1893, and is generally acknowledged as the birth of the field of criminalistics. The work combined in one system fields of knowledge that had not been previously integrated, such as psychology and physical science, and which could be successfully used against crime. Gross adapted some fields to the needs of criminal investigation, such as
crime scene photography Forensic photography may refer to the visual documentation of different aspects that can be found at a crime scene. It may include the documentation of the crime scene, or physical evidence that is either found at a crime scene or already proce ...
. He went on to found the Institute of Criminalistics in 1912, as part of the University of Graz' Law School. This Institute was followed by many similar institutes all over the world. In 1909,
Archibald Reiss Rodolphe Archibald Reiss (8 July 1875 – 7 August 1929) was a German–Swiss criminology-pioneer, forensic scientist, professor and writer. Early life and studies The Reiss family was in agriculture and winemaking. Archibald was the eighth o ...
founded the ''Institut de police scientifique'' of the University of Lausanne (UNIL), the first school of forensic science in the world. Dr. Edmond Locard, became known as the "
Sherlock Holmes Sherlock Holmes () is a fictional detective created by British author Arthur Conan Doyle. Referring to himself as a " consulting detective" in the stories, Holmes is known for his proficiency with observation, deduction, forensic science and ...
of
France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of Overseas France, overseas regions and territories in the Americas and the Atlantic Ocean, Atlantic, Pacific Ocean, Pac ...
". He formulated the basic principle of forensic science: "Every contact leaves a trace", which became known as Locard's exchange principle. In 1910, he founded what may have been the first criminal laboratory in the world, after persuading the Police Department of
Lyon Lyon,, ; Occitan: ''Lion'', hist. ''Lionés'' also spelled in English as Lyons, is the third-largest city and second-largest metropolitan area of France. It is located at the confluence of the rivers Rhône and Saône, to the northwest of ...
(France) to give him two attic rooms and two assistants. Symbolic of the newfound prestige of forensics and the use of reasoning in detective work was the popularity of the fictional character
Sherlock Holmes Sherlock Holmes () is a fictional detective created by British author Arthur Conan Doyle. Referring to himself as a " consulting detective" in the stories, Holmes is known for his proficiency with observation, deduction, forensic science and ...
, written by
Arthur Conan Doyle Sir Arthur Ignatius Conan Doyle (22 May 1859 – 7 July 1930) was a British writer and physician. He created the character Sherlock Holmes in 1887 for ''A Study in Scarlet'', the first of four novels and fifty-six short stories about Ho ...
in the late 19th century. He remains a great inspiration for forensic science, especially for the way his acute study of a crime scene yielded small clues as to the precise sequence of events. He made great use of trace evidence such as shoe and tire impressions, as well as fingerprints,
ballistics Ballistics is the field of mechanics concerned with the launching, flight behaviour and impact effects of projectiles, especially ranged weapon munitions such as bullets, unguided bombs, rockets or the like; the science or art of designing a ...
and handwriting analysis, now known as
questioned document examination In forensic science, questioned document examination (QDE) is the examination of documents potentially disputed in a court of law. Its primary purpose is to provide evidence about a suspicious or questionable document using scientific processe ...
. Such evidence is used to test theories conceived by the police, for example, or by the investigator himself. All of the techniques advocated by Holmes later became reality, but were generally in their infancy at the time Conan Doyle was writing. In many of his reported cases, Holmes frequently complains of the way the crime scene has been contaminated by others, especially by the police, emphasising the critical importance of maintaining its integrity, a now well-known feature of crime scene examination. He used
analytical chemistry Analytical chemistry studies and uses instruments and methods to separate, identify, and quantify matter. In practice, separation, identification or quantification may constitute the entire analysis or be combined with another method. Separati ...
for blood residue analysis as well as
toxicology Toxicology is a scientific discipline, overlapping with biology, chemistry, pharmacology, and medicine, that involves the study of the adverse effects of chemical substances on living organisms and the practice of diagnosing and treating e ...
examination and determination for poisons. He used
ballistics Ballistics is the field of mechanics concerned with the launching, flight behaviour and impact effects of projectiles, especially ranged weapon munitions such as bullets, unguided bombs, rockets or the like; the science or art of designing a ...
by measuring bullet calibres and matching them with a suspected murder weapon.


Late 19th – early 20th century figures

Hans Gross applied scientific methods to crime scenes and was responsible for the birth of criminalistics. Edmond Locard expanded on Gross' work with Locard's Exchange Principle which stated "whenever two objects come into contact with one another, materials are exchanged between them". This means that every contact by a criminal leaves a trace. Alexander Lacassagne, who taught Locard, produced autopsy standards on actual forensic cases. Alphonse Bertillon was a French criminologist and founder of Anthropometry (scientific study of measurements and proportions of the human body). He used anthropometry for identification, stating that, since each individual is unique, by measuring aspects of physical difference there could be a personal identification system. He created the Bertillon System around 1879, a way of identifying criminals and citizens by measuring 20 parts of the body. In 1884, over 240 repeat offenders were caught using the Bertillon system, but the system was largely superseded by fingerprinting. Frances Glessner Lee, known as "the mother of forensic science", was instrumental in the development of forensic science in the US. She lobbied to have coroners replaced by medical professionals, endowed the Harvard Associates in Police Science, and conducted many seminars to educate homicide investigators. She also created the Nutshell Studies of Unexplained Death, intricate crime scene dioramas used to train investigators, which are still in use today.


20th century

Later in the 20th century several British pathologists, Mikey Rochman,
Francis Camps Francis Edward Camps, FRCP, FRCPath (28 June 1905 – 8 July 1972) was an English pathologist notable for his work on the cases of serial killer John Christie and suspected serial killer John Bodkin Adams. Early life and training Camps was b ...
,
Sydney Smith Sydney Smith (3 June 1771 – 22 February 1845) was an English wit, writer, and Anglican cleric. Early life and education Born in Woodford, Essex, England, Smith was the son of merchant Robert Smith (1739–1827) and Maria Olier (1750–1801) ...
and Keith Simpson pioneered new forensic science methods.
Alec Jeffreys Sir Alec John Jeffreys, (born 9 January 1950) is a British geneticist known for developing techniques for genetic fingerprinting and DNA profiling which are now used worldwide in forensic science to assist police detective work and to resolve ...
pioneered the use of
DNA profiling DNA profiling (also called DNA fingerprinting) is the process of determining an individual's DNA characteristics. DNA analysis intended to identify a species, rather than an individual, is called DNA barcoding. DNA profiling is a forensic t ...
in forensic science in 1984. He realized the scope of DNA fingerprinting, which uses variations in the
genetic code The genetic code is the set of rules used by living cells to translate information encoded within genetic material ( DNA or RNA sequences of nucleotide triplets, or codons) into proteins. Translation is accomplished by the ribosome, which links ...
to identify individuals. The method has since become important in forensic science to assist police detective work, and it has also proved useful in resolving paternity and immigration disputes. DNA fingerprinting was first used as a police forensic test to identify the rapist and killer of two teenagers, Lynda Mann and Dawn Ashworth, who were both murdered in
Narborough, Leicestershire Narborough is a large village and civil parish in the Blaby district of Leicestershire, England, around southwest of Leicester. The population of the civil parish (including Littlethorpe) was 8,498. The name is derived from the Old English ' ...
, in 1983 and 1986 respectively. Colin Pitchfork was identified and convicted of murder after samples taken from him matched
semen Semen, also known as seminal fluid, is an organic bodily fluid created to contain spermatozoa. It is secreted by the gonads (sexual glands) and other sexual organs of male or hermaphroditic animals and can fertilize the female ovum. Sem ...
samples taken from the two dead girls. Forensic science has been fostered by a number of national and international forensic science learned bodies including the
Chartered Society of Forensic Sciences Chartered may refer to: * Charter, a legal document conferring rights or privileges ** University charter ** Chartered company * Chartered (professional), a professional credential * Charter (shipping) * Charter (airlines) * Charter (typeface) * Cha ...
, (founded 1959), then known as the Forensic Science Society, publisher of ''
Science & Justice ''Science & Justice'' is a peer-reviewed scientific journal of forensics published by Elsevier on behalf of the Forensic Science Society and the International Society for Forensic Genetics. The journal was established in 1960 as the ''Journal of t ...
'';
American Academy of Forensic Sciences The American Academy of Forensic Sciences (AAFS) is a society for forensic science professionals, and was founded in 1948. The society is based in Colorado Springs, Colorado, USA. The AAFS is a multi-disciplinary professional organization that p ...
(founded 1948), publishers of the '' Journal of Forensic Sciences''; the
Canadian Society of Forensic Science The Canadian Society of Forensic Science (CSFS) is a professional association aimed at maintaining professional standards and promoting and enhancing the study and stature of forensic science. Membership in the society is open internationally to p ...
(founded 1953), publishers of the ''
Journal of the Canadian Society of Forensic Science The ''Canadian Society of Forensic Science Journal'' is a quarterly peer-reviewed academic journal which publishes original research papers, comments, and reviews relating to all aspects of forensic science. It was established in 1968, and is publi ...
''; the British Academy of Forensic Sciences (founded 1960), publishers of '' Medicine, Science and the Law''; the Australian Academy of Forensic Sciences (founded 1967), publishers of the ''Australian Journal of Forensic Sciences''; and the
European Network of Forensic Science Institutes The European Network of Forensic Science Institutes (ENFSI) was founded in 1995 in order to facilitate dialogue among the forensic science practitioners of Europe, as well as improving the quality of forensic science delivery. It has close coo ...
(founded 1995).


21st century

In the past decade, documenting forensics scenes has become more efficient. Forensic scientists have started using laser scanners, drones and photogrammetry to obtain 3D point clouds of accidents or crime scenes. Reconstruction of an accident scene on a highway using drones involves data acquisition time of only 10–20 minutes and can be performed without shutting down traffic. The results are not just accurate, in centimeters, for measurement to be presented in court but also easy to digitally preserve in the long term. Now, in the 21st century, much of forensic science's future is up for discussion. The
National Institute of Standards and Technology The National Institute of Standards and Technology (NIST) is an agency of the United States Department of Commerce whose mission is to promote American innovation and industrial competitiveness. NIST's activities are organized into physical s ...
(NIST) has offered the community some guidelines upon which the science should build. NIST recommends that forensic science rethinks its system. If local laboratories abide by these guidelines, 21st century forensics will be dramatically different from what it has been up to now. One of the more recent additions by NIST is a document called NISTIR-7941, titled "Forensic Science Laboratories: Handbook for Facility Planning, Design, Construction, and Relocation". The handbook provides a clear blueprint for approaching forensic science. The details even include what type of staff should be hired for certain positions.


Subdivisions

*
Art forensics Art forgery is the creating and selling of works of art which are falsely credited to other, usually more famous artists. Art forgery can be extremely lucrative, but modern dating and analysis techniques have made the identification of forged ar ...
concerns the art authentication cases to help research the work's authenticity. Art authentication methods are used to detect and identify forgery, faking and copying of art works, e.g. paintings. * Bloodstain pattern analysis is the scientific examination of blood spatter patterns found at a crime scene to reconstruct the events of the crime. * Comparative forensics is the application of visual comparison techniques to verify similarity of physical evidence. This includes fingerprint analysis, toolmark analysis, and ballistic analysis. *
Computational forensics Computational criminology is an interdisciplinary field which uses computing science methods to formally define criminology concepts, improve our understanding of complex phenomena, and generate solutions for related problems. Methods Computing sci ...
concerns the development of algorithms and software to assist forensic examination. *
Criminalistics Forensic science, also known as criminalistics, is the application of science to criminal and civil laws, mainly—on the criminal side—during criminal investigation, as governed by the legal standards of admissible evidence and criminal p ...
is the application of various sciences to answer questions relating to examination and comparison of biological evidence, trace evidence, impression evidence (such as
fingerprint A fingerprint is an impression left by the friction ridges of a human finger. The recovery of partial fingerprints from a crime scene is an important method of forensic science. Moisture and grease on a finger result in fingerprints on surfac ...
s, footwear impressions, and tire tracks),
controlled substance A controlled substance is generally a drug or chemical whose manufacture, possession and use is regulated by a government, such as illicitly used drugs or prescription medications that are designated by law. Some treaties, notably the Single ...
s, ballistics, firearm and toolmark examination, and other evidence in criminal investigations. In typical circumstances, evidence is processed in a crime lab. * Digital forensics is the application of proven scientific methods and techniques in order to recover data from electronic / digital media. Digital Forensic specialists work in the field as well as in the lab. *
Ear print analysis Ear print analysis is used as a means of forensic identification intended as an identification tool similar to fingerprinting. An ear print is a two-dimensional reproduction of the parts of the outer ear that have touched a specific surface (most c ...
is used as a means of forensic identification intended as an identification tool similar to fingerprinting. An earprint is a two-dimensional reproduction of the parts of the outer ear that have touched a specific surface (most commonly the helix, antihelix, tragus and antitragus). *
Election forensics Election forensics are methods used to determine if election results are statistically normal or statistically abnormal, which can indicate electoral fraud. It uses statistical tools to determine if observed election results differ from normally ...
is the use of statistics to determine if election results are normal or abnormal. It is also used to look into and detect the cases concerning gerrymandering. * Forensic accounting is the study and interpretation of accounting evidence, financial statement namely: Balance sheet, Income statement, Cash flow statement. *
Forensic aerial photography Forensic science, also known as criminalistics, is the application of science to criminal and civil laws, mainly—on the criminal side—during criminal investigation, as governed by the legal standards of admissible evidence and criminal p ...
is the study and interpretation of aerial photographic evidence. *
Forensic anthropology Forensic anthropology is the application of the anatomical science of anthropology and its various subfields, including forensic archaeology and forensic taphonomy, in a legal setting. A forensic anthropologist can assist in the identification ...
is the application of
physical anthropology Biological anthropology, also known as physical anthropology, is a scientific discipline concerned with the biological and behavioral aspects of human beings, their extinct hominin ancestors, and related non-human primates, particularly from an e ...
in a legal setting, usually for the recovery and identification of skeletonized human remains. * Forensic archaeology is the application of a combination of
archaeological Archaeology or archeology is the scientific study of human activity through the recovery and analysis of material culture. The archaeological record consists of artifacts, architecture, biofacts or ecofacts, sites, and cultural landscap ...
techniques and forensic science, typically in law enforcement. *
Forensic astronomy Forensic astronomy is the use of astronomy, the scientific study of celestial objects, to determine the appearance of the sky at specific times in the past. This has been used, if relatively rarely, in forensic science (that is, for solving problem ...
uses methods from
astronomy Astronomy () is a natural science that studies celestial objects and phenomena. It uses mathematics, physics, and chemistry in order to explain their origin and evolution. Objects of interest include planets, moons, stars, nebulae, g ...
to determine past celestial constellations for forensic purposes. * Forensic botany is the study of plant life in order to gain information regarding possible crimes. *
Forensic chemistry Forensic chemistry is the application of chemistry and its subfield, forensic toxicology, in a legal setting. A forensic chemist can assist in the identification of unknown materials found at a crime scene. Specialists in this field have a wid ...
is the study of detection and identification of
illicit drugs The prohibition of drugs through sumptuary legislation or religious law is a common means of attempting to prevent the recreational use of certain intoxicating substances. While some drugs are illegal to possess, many governments regulate t ...
, accelerants used in
arson Arson is the crime of willfully and deliberately setting fire to or charring property. Although the act of arson typically involves buildings, the term can also refer to the intentional burning of other things, such as motor vehicles, wate ...
cases, explosive and
gunshot residue Gunshot residue (GSR), also known as cartridge discharge residue (CDR), gunfire residue (GFR), or firearm discharge residue (FDR), consists of all of the particles that are expelled from the muzzle of a gun following the discharge of a bullet. It ...
. * Forensic dactyloscopy is the study of
fingerprint A fingerprint is an impression left by the friction ridges of a human finger. The recovery of partial fingerprints from a crime scene is an important method of forensic science. Moisture and grease on a finger result in fingerprints on surfac ...
s. * Forensic document examination or
questioned document examination In forensic science, questioned document examination (QDE) is the examination of documents potentially disputed in a court of law. Its primary purpose is to provide evidence about a suspicious or questionable document using scientific processe ...
answers questions about a disputed document using a variety of scientific processes and methods. Many examinations involve a comparison of the questioned document, or components of the document, with a set of known standards. The most common type of examination involves handwriting, whereby the examiner tries to address concerns about potential authorship. * Forensic DNA analysis takes advantage of the uniqueness of an individual's DNA to answer forensic questions such as paternity/maternity testing and placing a suspect at a crime scene, e.g. in a
rape investigation Rape investigation is the procedure to gather facts about a suspected rape, including forensic identification of a perpetrator, type of rape and other details. The vast majority of rapes are committed by persons known to the victim: only betwe ...
. *
Forensic engineering Forensic engineering has been defined as ''"the investigation of failures - ranging from serviceability to catastrophic - which may lead to legal activity, including both civil and criminal".'' It includes the investigation of materials, produc ...
is the scientific examination and analysis of structures and products relating to their failure or cause of damage. *
Forensic entomology Forensic entomology is the scientific study of the colonization of a dead body by arthropods. This includes the study of insect types commonly associated with cadavers, their respective life cycles, their ecological presences in a given environme ...
deals with the examination of
insects Insects (from Latin ') are pancrustacean hexapod invertebrates of the class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body (head, thorax and abdomen), three pairs of j ...
in, on and around human remains to assist in determination of time or location of death. It is also possible to determine if the body was moved after death using entomology. *
Forensic geology Forensic geology is the study of evidence relating to minerals, oil, petroleum, and other materials found in the Earth, used to answer questions raised by the legal system. In 1975, Ray Murray and fellow Rutgers University professor John Tedrow ...
deals with trace evidence in the form of soils, minerals and petroleum. * Forensic geomorphology is the study of the ground surface to look for potential location(s) of buried object(s). * Forensic geophysics is the application of geophysical techniques such as radar for detecting objects hidden underground or underwater. * Forensic intelligence process starts with the collection of data and ends with the integration of results within into the analysis of crimes under investigation. *
Forensic interviews Forensic science, also known as criminalistics, is the application of science to criminal and civil laws, mainly—on the criminal side—during criminal investigation, as governed by the legal standards of admissible evidence and criminal p ...
are conducted using the science of professionally using expertise to conduct a variety of investigative interviews with victims, witnesses, suspects or other sources to determine the facts regarding suspicions, allegations or specific incidents in either public or private sector settings. * Forensic histopathology is the application of histological techniques and examination to forensic pathology practice. *
Forensic limnology Forensic limnology is a sub-field of freshwater ecology, which focuses especially on the presence of diatoms in crime scene samples and victims. Different methods are used to collect this data but all identify the ratios of different diatom coloni ...
is the analysis of evidence collected from crime scenes in or around fresh-water sources. Examination of biological organisms, in particular
diatom A diatom ( Neo-Latin ''diatoma''), "a cutting through, a severance", from el, διάτομος, diátomos, "cut in half, divided equally" from el, διατέμνω, diatémno, "to cut in twain". is any member of a large group comprising se ...
s, can be useful in connecting suspects with victims. * Forensic linguistics deals with issues in the legal system that requires linguistic expertise. *
Forensic meteorology Forensic meteorology is meteorology, the scientific study of weather, applied to the process of reconstructing weather events for a certain time and location. This is done by acquiring and analyzing local weather reports such as surface observations ...
is a site-specific analysis of past weather conditions for a point of loss. * Forensic microbiology is the study of the
necrobiome The necrobiome has been defined as the community of species associated with decaying corpse remains. The process of decomposition is complex. Microbes decompose cadavers, but other organisms including fungi, nematodes, insects, and larger scavenger ...
. *
Forensic nursing Forensic nursing is defined as the application of the nursing process to public or legal proceedings, and the application of forensic health care in the scientific investigation of trauma and/or death related to abuse, violence, criminal activity, l ...
is the application of
Nursing Nursing is a profession within the health care sector focused on the care of individuals, families, and communities so they may attain, maintain, or recover optimal health and quality of life. Nurses may be differentiated from other health ...
sciences to abusive crimes, like child abuse, or sexual abuse. Categorization of wounds and traumas, collection of bodily fluids and emotional support are some of the duties of forensic nurses. * Forensic odontology is the study of the uniqueness of dentition, better known as the study of teeth. *
Forensic optometry Forensic science, also known as criminalistics, is the application of science to criminal and civil laws, mainly—on the criminal side—during criminal investigation, as governed by the legal standards of admissible evidence and criminal p ...
is the study of glasses and other eyewear relating to crime scenes and criminal investigations. *
Forensic pathology Forensic pathology is pathology that focuses on determining the cause of death by examining a corpse. A post mortem examination is performed by a medical examiner or forensic pathologist, usually during the investigation of criminal law cases ...
is a field in which the principles of
medicine Medicine is the science and practice of caring for a patient, managing the diagnosis, prognosis, prevention, treatment, palliation of their injury or disease, and promoting their health. Medicine encompasses a variety of health care pr ...
and
pathology Pathology is the study of the causes and effects of disease or injury. The word ''pathology'' also refers to the study of disease in general, incorporating a wide range of biology research fields and medical practices. However, when used in ...
are applied to determine a cause of death or injury in the context of a legal inquiry. *
Forensic podiatry Forensic Podiatry is a subdiscipline of forensic science in which specialized podiatric knowledge including foot and lower limb anatomy, musculoskeletal function, deformities and diseases of the foot, ankle, lower extremities, and at times, the ...
is an application of the study of feet footprint or footwear and their traces to analyze scene of crime and to establish personal identity in forensic examinations. * Forensic psychiatry is a specialized branch of
psychiatry Psychiatry is the medical specialty devoted to the diagnosis, prevention, and treatment of mental disorders. These include various maladaptations related to mood, behaviour, cognition, and perceptions. See glossary of psychiatry. Initial p ...
as applied to and based on scientific
criminology Criminology (from Latin , "accusation", and Ancient Greek , ''-logia'', from λόγος ''logos'' meaning: "word, reason") is the study of crime and deviant behaviour. Criminology is an interdisciplinary field in both the behavioural and s ...
. * Forensic psychology is the study of the mind of an individual, using forensic methods. Usually it determines the circumstances behind a criminal's behavior. *
Forensic seismology Forensic seismology is the forensic use of the techniques of seismology to detect and study distant phenomena, particularly explosions, including those of nuclear weapons. Because of the efficiency with which seismic waves propagate through the Ear ...
is the study of techniques to distinguish the seismic signals generated by underground nuclear explosions from those generated by earthquakes. *
Forensic serology Forensic serology is the detection, identification, classification, and study of various bodily fluids such as blood, semen, saliva, and urine, and their relationship to a crime scene. A forensic serologist may also be involved in DNA analysis and ...
is the study of the body fluids. *
Forensic social work Forensic social work is the application of social work to questions and issues relating to law and legal systems. This specialty of the social work profession goes far beyond clinics and psychiatric hospitals for criminal defendants being evaluate ...
is the specialist study of
social work Social work is an academic discipline and practice-based profession concerned with meeting the basic needs of individuals, families, groups, communities, and society as a whole to enhance their individual and collective well-being. Social wo ...
theories and their applications to a clinical, criminal justice or
psychiatric Psychiatry is the medical specialty devoted to the diagnosis, prevention, and treatment of mental disorders. These include various maladaptations related to mood, behaviour, cognition, and perceptions. See glossary of psychiatry. Initial psy ...
setting. Practitioners of forensic social work connected with the
criminal justice system Criminal justice is the delivery of justice to those who have been accused of committing crimes. The criminal justice system is a series of government agencies and institutions. Goals include the rehabilitation of offenders, preventing other ...
are often termed Social Supervisors, whilst the remaining use the interchangeable titles
forensic social worker Forensic science, also known as criminalistics, is the application of science to criminal and civil laws, mainly—on the criminal side—during criminal investigation, as governed by the legal standards of admissible evidence and criminal p ...
,
approved mental health professional The role of approved mental health professional (AMHP) in the United Kingdom was created in the 2007 amendment of the Mental Health Act 1983 to replace the role of '' approved social worker'' (ASW). The role is broadly similar to the role of the ...
or forensic practitioner and they conduct specialist assessments of risk, care planning and act as an officer of the court. *
Forensic toxicology Forensic toxicology is the use of toxicology and disciplines such as analytical chemistry, pharmacology and clinical chemistry to aid medical or legal investigation of death, poisoning, and drug use. The primary concern for forensic toxicology is ...
is the study of the effect of
drugs A drug is any chemical substance that causes a change in an organism's physiology or psychology when consumed. Drugs are typically distinguished from food and substances that provide nutritional support. Consumption of drugs can be via inhalati ...
and
poison Poison is a chemical substance that has a detrimental effect to life. The term is used in a wide range of scientific fields and industries, where it is often specifically defined. It may also be applied colloquially or figuratively, with a broa ...
s on/in the human body. *
Forensic video analysis Forensic video analysis is the scientific examination, comparison and/or evaluation of video in legal matters. Forensic video analysis usage Forensic video analysis has been used in a variety of high profile cases, international disagreements, ...
is the scientific examination, comparison and evaluation of video in legal matters. * Mobile device forensics is the scientific examination and evaluation of evidence found in mobile phones, e.g. Call History and Deleted SMS, and includes SIM Card Forensics. * Trace evidence analysis is the analysis and comparison of trace evidence including glass, paint, fibres and hair (e.g., using micro-spectrophotometry). *
Wildlife forensic science Wildlife forensic science is forensic science applied to legal issues involving wildlife. Laboratories and organizations With the initiative of the Society for Wildlife Forensic Science (SWFS), the Scientific Working Group for Wildlife Forensic S ...
applies a range of scientific disciplines to legal cases involving non-human biological evidence, to solve crimes such as poaching,
animal abuse Cruelty to animals, also called animal abuse, animal neglect or animal cruelty, is the infliction by omission (neglect) or by commission by humans of suffering or harm upon non-human animals. More narrowly, it can be the causing of harm or suf ...
, and trade in endangered species.


Questionable techniques

Some forensic techniques, believed to be scientifically sound at the time they were used, have turned out later to have much less scientific merit or none. Some such techniques include: * Comparative bullet-lead analysis was used by the FBI for over four decades, starting with the
John F. Kennedy assassination John F. Kennedy, the 35th president of the United States, was assassinated on Friday, November 22, 1963, at 12:30 p.m. CST in Dallas, Texas, while riding in a presidential motorcade through Dealey Plaza. Kennedy was in the vehicle with ...
in 1963. The theory was that each batch of
ammunition Ammunition (informally ammo) is the material fired, scattered, dropped, or detonated from any weapon or weapon system. Ammunition is both expendable weapons (e.g., bombs, missiles, grenades, land mines) and the component parts of other we ...
possessed a chemical makeup so distinct that a bullet could be traced back to a particular batch or even a specific box. Internal studies and an outside study by the
National Academy of Sciences The National Academy of Sciences (NAS) is a United States nonprofit, non-governmental organization. NAS is part of the National Academies of Sciences, Engineering, and Medicine, along with the National Academy of Engineering (NAE) and the Nat ...
found that the technique was unreliable due to improper interpretation, and the FBI abandoned the test in 2005. * Forensic dentistry has come under fire: in at least three cases bite-mark evidence has been used to convict people of murder who were later freed by DNA evidence. A 1999 study by a member of the American Board of Forensic Odontology found a 63 percent rate of false identifications and is commonly referenced within online news stories and conspiracy websites. The study was based on an informal workshop during an ABFO meeting, which many members did not consider a valid scientific setting. * By the late 2000s, scientists were able to show that it is possible to fabricate DNA evidence, thus "undermining the credibility of what has been considered the gold standard of proof in criminal cases".Pollack, Andrew (17 August 2009)
" DNA Evidence Can Be Fabricated, Scientists Show"
. ''The New York Times''.


Litigation science

"Litigation science" describes analysis or data developed or produced ''expressly'' for use in a trial versus those produced in the course of independent research. This distinction was made by the U.S. 9th Circuit Court of Appeals when evaluating the admissibility of experts. This uses
demonstrative evidence Demonstrative evidence is evidence in the form of a representation of an object. This is, as opposed to, real evidence, testimony, or other forms of evidence used at trial. Examples Examples of demonstrative evidence include photos, x-rays, ...
, which is evidence created in preparation of trial by attorneys or
paralegal A paralegal, also known as a legal assistant, or paralegal specialist is a professional who performs tasks that require knowledge of legal concepts but not the full expertise of a lawyer with a license to practice law. The market for paralegals i ...
s.


Demographics

In the United States there are over 17,200 forensic science technicians, as of 2019.


Media impact

Real-life crime scene investigators and forensic scientists warn that popular television shows do not give a realistic picture of the work, often wildly distorting its nature, and exaggerating the ease, speed, effectiveness, drama, glamour, influence and comfort level of their jobs—which they describe as far more mundane, tedious and boring.Flavin, Brianna (quoting Brian McKenna, retired police Lieutenant and Crime Scene Investigator)
"How Accurate are Crime Shows on TV? Debunking 7 Common Myths,"
7 February 2017, ''Blog,'' School of Justice Studies, Rasmussen College, Inc., Oak Brook, IL, retrieved 31 May 2017
Stanton, Dawn (quoting Robert Shaler, Ph.D., prof. of biochemistry and molecular biology, dir., forensic science program, Penn. State Univ. formerly at Pittsburgh Crime Laboratory, New York City Office of Chief Medical Examiner, and Lifecodes Corp (nation's first forensic DNA laboratory))
"Probing Question: Is forensic science on TV accurate?,"
10 November 2009, Eberly College of Science, Penn. State Univ., retrieved 31 May 2017
Some claim these modern TV shows have changed individuals' expectations of forensic science, sometimes unrealistically—an influence termed the " CSI effect".Alldredge, Joh
"The 'CSI Effect' and Its Potential Impact on Juror Decisions,"
(2015) ''Themis: Research Journal of Justice Studies and Forensic Science'': Vol. 3: Iss. 1, Article 6., retrieved 31 May 2017
Further, research has suggested that public misperceptions about criminal forensics can create, in the mind of a
juror A jury is a sworn body of people (jurors) convened to hear evidence and render an impartial verdict (a finding of fact on a question) officially submitted to them by a court, or to set a penalty or judgment. Juries developed in England dur ...
, unrealistic expectations of forensic evidence—which they expect to see before convicting—implicitly biasing the juror towards the defendant. Citing the "CSI effect," at least one researcher has suggested screening jurors for their level of influence from such TV programs.


Controversies

Questions about certain areas of forensic science, such as fingerprint evidence and the assumptions behind these disciplines have been brought to light in some publications including the ''New York Post''. The article stated that "No one has proved even the basic assumption: That everyone's fingerprint is unique." The article also stated that "Now such assumptions are being questioned—and with it may come a radical change in how forensic science is used by police departments and prosecutors." Law professor Jessica Gabel said on NOVA that forensic science "lacks the rigors, the standards, the quality controls and procedures that we find, usually, in science". In the US, on 25 June 2009, the Supreme Court issued a 5-to-4 decision in ''
Melendez-Diaz v. Massachusetts ''Melendez-Diaz v. Massachusetts'', 557 U.S. 305 (2009), is a United States Supreme Court case in which the Court held that it was a violation of the Sixth Amendment right of confrontation for a prosecutor to submit a chemical drug test report wit ...
'' stating that crime laboratory reports may not be used against criminal defendants at trial unless the analysts responsible for creating them give testimony and subject themselves to cross-examination. The Supreme Court cited the National Academies of Sciences report ''Strengthening Forensic Science in the United States'' in their decision. Writing for the majority, Justice
Antonin Scalia Antonin Gregory Scalia (; March 11, 1936 – February 13, 2016) was an American jurist who served as an associate justice of the Supreme Court of the United States from 1986 until his death in 2016. He was described as the intellectu ...
referred to the National Research Council report in his assertion that "Forensic evidence is not uniquely immune from the risk of manipulation." In the US, another area of forensic science that has come under question in recent years is the lack of laws requiring the accreditation of forensic labs. Some states require accreditation, but some states do not. Because of this, many labs have been caught performing very poor work resulting in false convictions or acquittals. For example, it was discovered after an audit of the Houston Police Department in 2002 that the lab had fabricated evidence which led George Rodriguez being convicted of raping a fourteen-year-old girl. The former director of the lab, when asked, said that the total number of cases that could have been contaminated by improper work could be in the range of 5,000 to 10,000. The Innocence Project database of DNA exonerations shows that many wrongful convictions contained forensic science errors. As indicated by the National Academy of Sciences report ''Strengthening Forensic Sciences in the United States'', part of the problem is that many traditional forensic sciences have never been empirically validated; and part of the problem is that all examiners are subject to forensic confirmation biases and should be shielded from contextual information not relevant to the judgment they make. Many studies have discovered a difference in rape-related injuries reporting based on race, with white victims reporting a higher frequency of injuries than black victims.Baker RB, Fargo JD, Shambley-Ebron D, Sommers MS. "A source of healthcare disparity: Race, skin color, and injuries after rape among adolescents and young adults". ''Journal of Forensic Nursing'', 2010; 6: 144–150 However, since current forensic examination techniques may not be sensitive to all injuries across a range of skin colors, more research needs to be conducted to understand if this trend is due to skin confounding healthcare providers when examining injuries or if darker skin extends a protective element. In clinical practice, for patients with darker skin, one study recommends that attention must be paid to the thighs, labia majora, posterior fourchette and fossa navicularis, so that no rape-related injuries are missed upon close examination.


Forensic science and humanitarian work

The
International Committee of the Red Cross The International Committee of the Red Cross (ICRC; french: Comité international de la Croix-Rouge) is a humanitarian organization which is based in Geneva, Switzerland, and it is also a three-time Nobel Prize Laureate. State parties (signato ...
(ICRC) uses forensic science for humanitarian purposes to clarify the fate of missing persons after armed conflict, disasters or migration, and is one of the services related to
Restoring Family Links Restoring Family Links (RFL) is a program of the Red Cross and Red Crescent Movement, more specifically the International Committee of the Red Cross (ICRC) and National Red Cross and Red Crescent Societies involving activities that aim to pre ...
and Missing Persons. Knowing what has happened to a missing relative can often make it easier to proceed with the grieving process and move on with life for families of missing persons. Forensic science is used by various other organizations to clarify the fate and whereabouts of persons who have gone missing. Examples include the NGO
Argentine Forensic Anthropology Team The Argentine Forensic Anthropology Team ( es, Equipo Argentino de Antropología Forense, EAAF) is an Argentine not-for-profit scientific non-governmental organisation. It was created in 1986 at the initiative of various human rights organisation ...
, working to clarify the fate of people who disappeared during the period of the 1976–1983 military dictatorship. The
International Commission on Missing Persons The International Commission on Missing Persons (ICMP) is an intergovernmental organization that addresses the issue of persons missing as a result of armed conflicts, violations of human rights, and natural disasters. It is headquartered in The H ...
(ICMP) uses forensic science to find missing persons, for example after the conflicts in the Balkans. Recognising the role of forensic science for humanitarian purposes, as well as the importance of forensic investigations in fulfilling the state's responsibilities to investigate human rights violations, a group of experts in the late-1980s devised a UN Manual on the Prevention and Investigation of Extra-Legal, Arbitrary and Summary Executions, which became known as the Minnesota Protocol. This document was revised and re-published by the
Office of the High Commissioner for Human Rights The Office of the United Nations High Commissioner for Human Rights, commonly known as the Office of the High Commissioner for Human Rights (OHCHR) or the United Nations Human Rights Office, is a department of the Secretariat of the United Nati ...
in 2016.


See also

* Association of Firearm and Tool Mark Examiners *
Canadian Identification Society The Canadian Identification Society (CIS) is a bilingual (English- French) professional non-for-profit fellowship of police officers and civilian members who share interests and employment in crime scene investigation. Also known in French as (S ...
*
Computer forensics Computer forensics (also known as computer forensic science) is a branch of digital forensic science pertaining to evidence found in computers and digital storage media. The goal of computer forensics is to examine digital media in a forensica ...
* Crime science *
Diplomatics Diplomatics (in American English, and in most anglophone countries), or diplomatic (in British English), is a scholarly discipline centred on the critical analysis of documents: especially, historical documents. It focuses on the conventions, p ...
(forensic paleography) * Epigenetics in forensic science *
Evidence packaging Evidence packaging involves the specialized packaging methods and materials used for physical evidence. Items need to be collected at a crime scene or a fire scene, forwarded to a laboratory for forensic analysis, put in secure storage, and ...
*
Forensic biology Forensic biology is the application of biology to associate a person(s), whether suspect or victim, to a location, an item (or collection of items), another person (victim or suspect, respectively). It can be utilized to further investigations for ...
* Forensic economics *
Forensic identification Forensic identification is the application of forensic science, or "forensics", and technology to identify specific objects from the trace evidence they leave, often at a crime scene or the scene of an accident. Forensic means "for the courts". ...
* Forensic materials engineering * Forensic photography * Forensic polymer engineering * Forensic profiling * Glove prints *
History of forensic photography Forensic science holds the branch of forensic photography which encompasses documenting both suspected and convicted criminals, and also the crime scenes, victims, and other evidence needed to make a conviction. Although photography was widely ackno ...
* International Association for Identification *
Marine forensics Marine Forensic Science is forensic science applied to legal issues involving marine life. It also refers to the scientific study of incidents or accidents occurring as a result of or involving bodies of water including oceans, streams or rivers, la ...
*
Outline of forensic science The following outline is provided as an overview of and topical guide to forensic science: Forensic science – application of a broad spectrum of sciences to answer questions of interest to a legal system. This may be in matters relating to ...
* Profiling (information science) * Retrospective diagnosis * Rapid Stain Identification Series (RSID * Scenes of crime officer *
Skid mark A skid mark is the visible mark left by any solid which moves against another, and is an important aspect of trace evidence analysis in forensic science and forensic engineering. Skid marks caused by tires on roads occur when a vehicle wheel ...
* University of Florida forensic science distance education program


References


Bibliography


Anil Aggrawal's Internet Journal of Forensic Medicine and Toxicology
* ''Forensic Magazine'' �
Forensicmag.com


an open access journal of the FBI.
Forensic sciences international
– An international journal dedicated to the applications of medicine and science in the administration of justice – –
Elsevier Elsevier () is a Dutch academic publishing company specializing in scientific, technical, and medical content. Its products include journals such as '' The Lancet'', '' Cell'', the ScienceDirect collection of electronic journals, '' Trends'', ...

International Journal of Digital Crime and Forensics

"The Real CSI"
PBS
Frontline Front line refers to the forward-most forces on a battlefield. Front line, front lines or variants may also refer to: Books and publications * ''Front Lines'' (novel), young adult historical novel by American author Michael Grant * ''Frontlines ...
documentary, 17 April 2012. * Baden, Michael; Roach, Marion. ''Dead Reckoning: The New Science of Catching Killers'', Simon & Schuster, 2001. . * Bartos, Leah
"No Forensic Background? No Problem"
''
ProPublica ProPublica (), legally Pro Publica, Inc., is a nonprofit organization based in New York City. In 2010, it became the first online news source to win a Pulitzer Prize, for a piece written by one of its journalists''The Guardian'', April 13, 2010P ...
'', 17 April 2012. * Guatelli-Steinberg, Debbie; Mitchell, John C
Structure Magazine no. 40, "RepliSet: High Resolution Impressions of the Teeth of Human Ancestors"
* * Holt, Cynthia
''Guide to Information Sources in the Forensic Sciences''
Libraries Unlimited, 2006. . * Jamieson, Allan; Moenssens, Andre (eds).

John Wiley & Sons Ltd, 2009.
Online version
* Kind, Stuart; Overman, Michael. ''Science Against Crime'' Doubleday, 1972. . * Lewis, Peter Rhys; Gagg Colin; Reynolds, Ken. ''Forensic Materials Engineering: Case Studies''
CRC Press The CRC Press, LLC is an American publishing group that specializes in producing technical books. Many of their books relate to engineering, science and mathematics. Their scope also includes books on business, forensics and information techn ...
, 2004. * Nickell, Joe; Fischer, John F. ''Crime Science: Methods of Forensic Detection'',
University Press of Kentucky The University Press of Kentucky (UPK) is the scholarly publisher for the Commonwealth of Kentucky, and was organized in 1969 as successor to the University of Kentucky Press. The university had sponsored scholarly publication since 1943. In 1 ...
, 1999. . * Owen, D. (2000). ''Hidden Evidence: The Story of Forensic Science and how it Helped to Solve 40 of the World's Toughest Crimes'' Quintet Publishing, London. . * Quinche, Nicolas, and Margot, Pierre, "Coulier, Paul-Jean (1824–1890): A precursor in the history of fingermark detection and their potential use for identifying their source (1863)", ''Journal of forensic identification'' (Californie), 60 (2), March–April 2010, pp. 129–134. * Silverman, Mike; Thompson, Tony. ''Written in Blood: A History of Forensic Science''. 2014. * *


External links

*
Forensic educational resources
* {{Authority control Applied sciences Criminology Heuristics Medical aspects of death Chromatography