Criminal justice is the delivery of
justice
In its broadest sense, justice is the idea that individuals should be treated fairly. According to the ''Stanford Encyclopedia of Philosophy'', the most plausible candidate for a core definition comes from the ''Institutes (Justinian), Inst ...
to those who have been accused of committing
crime
In ordinary language, a crime is an unlawful act punishable by a State (polity), state or other authority. The term ''crime'' does not, in modern criminal law, have any simple and universally accepted definition,Farmer, Lindsay: "Crime, definiti ...
s. The criminal justice system is a series of
government
A government is the system or group of people governing an organized community, generally a State (polity), state.
In the case of its broad associative definition, government normally consists of legislature, executive (government), execu ...
agencies and institutions. Goals include the
rehabilitation of offenders, preventing other crimes, and moral support for victims. The primary institutions of the criminal justice system are the
police
The police are Law enforcement organization, a constituted body of Law enforcement officer, people empowered by a State (polity), state with the aim of Law enforcement, enforcing the law and protecting the Public order policing, public order ...
,
prosecution
A prosecutor is a legal representative of the prosecution in states with either the adversarial system, which is adopted in common law, or inquisitorial system, which is adopted in Civil law (legal system), civil law. The prosecution is the ...
and
defense
Defense or defence may refer to:
Tactical, martial, and political acts or groups
* Defense (military), forces primarily intended for warfare
* Civil defense, the organizing of civilians to deal with emergencies or enemy attacks
* Defense industr ...
lawyers, the
court
A court is an institution, often a government entity, with the authority to adjudicate legal disputes between Party (law), parties and Administration of justice, administer justice in Civil law (common law), civil, Criminal law, criminal, an ...
s and the
prison
A prison, also known as a jail, gaol, penitentiary, detention center, correction center, correctional facility, or remand center, is a facility where Prisoner, people are Imprisonment, imprisoned under the authority of the State (polity), state ...
s system.
Criminal justice system
Definition
The criminal justice system consists of three main parts:
#
Law enforcement
Law enforcement is the activity of some members of the government or other social institutions who act in an organized manner to enforce the law by investigating, deterring, rehabilitating, or punishing people who violate the rules and norms gove ...
agencies, usually the
police
The police are Law enforcement organization, a constituted body of Law enforcement officer, people empowered by a State (polity), state with the aim of Law enforcement, enforcing the law and protecting the Public order policing, public order ...
#
Court
A court is an institution, often a government entity, with the authority to adjudicate legal disputes between Party (law), parties and Administration of justice, administer justice in Civil law (common law), civil, Criminal law, criminal, an ...
s ,accompanying
prosecution
A prosecutor is a legal representative of the prosecution in states with either the adversarial system, which is adopted in common law, or inquisitorial system, which is adopted in Civil law (legal system), civil law. The prosecution is the ...
and
defence lawyers
#Agencies for detaining and supervising offenders, such as
prison
A prison, also known as a jail, gaol, penitentiary, detention center, correction center, correctional facility, or remand center, is a facility where Prisoner, people are Imprisonment, imprisoned under the authority of the State (polity), state ...
s and
probation
Probation in criminal law is a period of supervision over an offence (law), offender, ordered by the court often in lieu of incarceration. In some jurisdictions, the term ''probation'' applies only to community sentences (alternatives to incar ...
agencies.
In the criminal justice system, these distinct agencies operate together as the principal means of maintaining the
rule of law
The essence of the rule of law is that all people and institutions within a Body politic, political body are subject to the same laws. This concept is sometimes stated simply as "no one is above the law" or "all are equal before the law". Acco ...
within
society
A society () is a group of individuals involved in persistent social interaction or a large social group sharing the same spatial or social territory, typically subject to the same political authority and dominant cultural expectations. ...
.
Law enforcement
The first contact a defendant has with the criminal justice system is usually with the
police
The police are Law enforcement organization, a constituted body of Law enforcement officer, people empowered by a State (polity), state with the aim of Law enforcement, enforcing the law and protecting the Public order policing, public order ...
(or ''
law enforcement
Law enforcement is the activity of some members of the government or other social institutions who act in an organized manner to enforce the law by investigating, deterring, rehabilitating, or punishing people who violate the rules and norms gove ...
'') who investigates the suspected wrongdoing and makes an
arrest
An arrest is the act of apprehending and taking a person into custody (legal protection or control), usually because the person has been suspected of or observed committing a crime. After being taken into custody, the person can be question ...
, but if the suspect is dangerous to the whole nation, a national level
law enforcement agency
A law enforcement agency (LEA) is any government agency responsible for law enforcement within a specific jurisdiction through the employment and deployment of law enforcement officers and their resources. The most common type of law enforcement ...
is called in. When warranted, law enforcement agencies or police officers are empowered to use force and other forms of legal coercion and means to effect public and
social order
The term social order can be used in two senses: In the first sense, it refers to a particular system of social structures and institutions. Examples are the ancient, the feudal, and the capitalist social order. In the second sense, social orde ...
. The term is most commonly associated with police departments of a
state
State most commonly refers to:
* State (polity), a centralized political organization that regulates law and society within a territory
**Sovereign state, a sovereign polity in international law, commonly referred to as a country
**Nation state, a ...
that are authorized to exercise the
police power of that state within a defined legal or territorial area of responsibility. The word comes from the
Latin
Latin ( or ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally spoken by the Latins (Italic tribe), Latins in Latium (now known as Lazio), the lower Tiber area aroun ...
''politia'' ("civil administration"), which itself derives from the for ("city"). The first police force comparable to the present-day police was established in 1667 under King
Louis XIV
LouisXIV (Louis-Dieudonné; 5 September 16381 September 1715), also known as Louis the Great () or the Sun King (), was King of France from 1643 until his death in 1715. His verified reign of 72 years and 110 days is the List of longest-reign ...
in France, although modern police usually trace their origins to the 1800 establishment of the
Thames River Police
The Thames River Police was formed in 1800 to tackle theft and looting from ships anchored in the Pool of London and in the lower reaches and docks of the Thames. It replaced the Marine Police, a police force established in 1798 by magistrate ...
in
London
London is the Capital city, capital and List of urban areas in the United Kingdom, largest city of both England and the United Kingdom, with a population of in . London metropolitan area, Its wider metropolitan area is the largest in Wester ...
, the
Glasgow Police, and the
Napoleonic police of Paris.
Police are primarily concerned with keeping the peace and enforcing
criminal law
Criminal law is the body of law that relates to crime. It proscribes conduct perceived as threatening, harmful, or otherwise endangering to the property, health, safety, and Well-being, welfare of people inclusive of one's self. Most criminal l ...
based on their particular mission and jurisdiction. Formed in 1908, the
Federal Bureau of Investigation
The Federal Bureau of Investigation (FBI) is the domestic Intelligence agency, intelligence and Security agency, security service of the United States and Federal law enforcement in the United States, its principal federal law enforcement ag ...
began as an entity which could investigate and enforce specific federal laws as an investigative and "
law enforcement agency
A law enforcement agency (LEA) is any government agency responsible for law enforcement within a specific jurisdiction through the employment and deployment of law enforcement officers and their resources. The most common type of law enforcement ...
" in the United States; this, however, has constituted only a small portion of overall policing activity. Policing has included an array of activities in different contexts, but the predominant ones are concerned with
order maintenance and the provision of services. During modern times, such endeavors contribute toward fulfilling a shared mission among law enforcement organizations with respect to the traditional policing mission of deterring crime and maintaining societal order.
Courts

The courts serve as the venue where disputes are settled and justice is then administered. With regard to criminal justice, there are a number of critical people in any court setting. These critical people are referred to as the courtroom work group and include both professional and non professional individuals. These include the
judge
A judge is a person who wiktionary:preside, presides over court proceedings, either alone or as a part of a judicial panel. In an adversarial system, the judge hears all the witnesses and any other Evidence (law), evidence presented by the barris ...
,
prosecutor
A prosecutor is a legal representative of the prosecution in states with either the adversarial system, which is adopted in common law, or inquisitorial system, which is adopted in Civil law (legal system), civil law. The prosecution is the ...
, and the
defense attorney. The judge, or magistrate, is a person, elected or appointed, who is knowledgeable in the law, and whose function is to objectively administer the legal proceedings and offer a final decision to dispose of a case.
In the U.S. and in a growing number of nations,
guilt or innocence (although in the U.S. a jury can never find a defendant "innocent" but rather "not guilty") is decided through the
adversarial system
The adversarial system (also adversary system, accusatorial system, or accusatory system) is a legal system used in the common law countries where two advocates represent their parties' case or position before an impartial person or group of peopl ...
. In this system, two parties will both offer their version of events and
argue their case before the court (sometimes before a judge or panel of judges, sometimes before a jury). The case should be decided in favor of the party who offers the most sound and compelling arguments based on the law as applied to the facts of the case.
The prosecutor, or district attorney, is a
lawyer
A lawyer is a person who is qualified to offer advice about the law, draft legal documents, or represent individuals in legal matters.
The exact nature of a lawyer's work varies depending on the legal jurisdiction and the legal system, as w ...
who brings charges against a person, persons or corporate entity. It is the prosecutor's duty to explain to the court what crime was committed and to detail what
evidence
Evidence for a proposition is what supports the proposition. It is usually understood as an indication that the proposition is truth, true. The exact definition and role of evidence vary across different fields. In epistemology, evidence is what J ...
has been found which incriminates the accused. The prosecutor should not be confused with a
plaintiff
A plaintiff ( Π in legal shorthand) is the party who initiates a lawsuit (also known as an ''action'') before a court. By doing so, the plaintiff seeks a legal remedy. If this search is successful, the court will issue judgment in favor of the ...
or plaintiff's counsel. Although both serve the function of bringing a complaint before the court, the prosecutor is a servant of the state who makes accusations on behalf of the state in criminal proceedings, while the plaintiff is the complaining party in civil proceedings.
A defense attorney counsels the accused on the a legal process, likely outcomes for the accused and suggests strategies. The accused, not the lawyer, has the right to make final decisions regarding a number of fundamental points, including whether to testify, and to accept a plea offer or demand a jury trial in appropriate cases. It is the defense attorney's duty to represent the interests of the client, raise procedural and evidentiary issues, and hold the prosecution to its burden of proving guilt beyond a reasonable doubt. Defense counsel may challenge evidence presented by the prosecution or present exculpatory evidence and argue on behalf of their client. At trial, the defense attorney may attempt to offer a
rebuttal
In law, rebuttal is a form of evidence that is presented to contradict or nullify other evidence that has been presented by an adverse party. By analogy the same term is used in politics and public affairs to refer to the informal process by w ...
to the prosecutor's accusations.
In the U.S., accused people are entitled to a government-paid defense attorney if the individual is in jeopardy of losing life and/or liberty. Those who cannot afford a private attorney may be provided one by the state. Historically, however, the right to a defense attorney has not always been universal. For example, in
Tudor England criminals accused of
treason
Treason is the crime of attacking a state (polity), state authority to which one owes allegiance. This typically includes acts such as participating in a war against one's native country, attempting to Coup d'état, overthrow its government, spy ...
were not permitted to offer arguments in their defense. In many jurisdictions, there is no right to an appointed attorney, if the accused is not in jeopardy of losing his or her liberty.
The final determination of guilt or innocence is typically made by a third party, who is supposed to be disinterested. This function may be performed by a judge, a panel of judges, or a
jury
A jury is a sworn body of people (jurors) convened to hear evidence, make Question of fact, findings of fact, and render an impartiality, impartial verdict officially submitted to them by a court, or to set a sentence (law), penalty or Judgmen ...
panel composed of unbiased citizens. This process varies depending on the laws of the specific jurisdiction. In some places the panel (be it judges or a jury) is required to issue a unanimous decision, while in others only a majority
vote
Voting is the process of choosing officials or policies by casting a ballot, a document used by people to formally express their preferences. Republics and representative democracies are governments where the population chooses representative ...
is required. In America, this process depends on the state, level of court, and even agreements between the prosecuting and defending parties. Some nations do not use juries at all, or rely on theological or military authorities to issue verdicts.
Some cases can be disposed of without the need for a trial. In fact, the vast majority are. If the accused confesses his or her guilt, a shorter process may be employed and a judgment may be rendered more quickly. Some nations, such as America, allow
plea bargaining A plea bargain, also known as a plea agreement or plea deal, is a legal arrangement in criminal law where the defendant agrees to plead guilty or no contest to a charge in exchange for concessions from the prosecutor. These concessions can include ...
in which the accused pleads guilty,
nolo contendere
''Nolo contendere'' () is a type of legal plea used in some jurisdictions in the United States. It is also referred to as a plea of no contest or no defense. It is a plea where the defendant neither admits nor disputes a Criminal charge, charg ...
or not guilty, and may accept a diversion program or reduced punishment, where the prosecution's case is weak or in exchange for the cooperation of the accused against other people. This reduced sentence is sometimes a reward for sparing the state the expense of a formal trial. Many nations do not permit the use of plea bargaining, believing that it coerces innocent people to plead guilty in an attempt to avoid a harsh punishment. The courts nowadays are seeking alternative measures as opposed to throwing someone into prison right away.
The entire trial process, whatever the country, is fraught with problems and subject to criticism.
Bias
Bias is a disproportionate weight ''in favor of'' or ''against'' an idea or thing, usually in a way that is inaccurate, closed-minded, prejudicial, or unfair. Biases can be innate or learned. People may develop biases for or against an individ ...
and
discrimination
Discrimination is the process of making unfair or prejudicial distinctions between people based on the groups, classes, or other categories to which they belong or are perceived to belong, such as race, gender, age, class, religion, or sex ...
form an ever-present threat to an objective decision. Any
prejudice
Prejudice can be an affect (psychology), affective feeling towards a person based on their perceived In-group and out-group, social group membership. The word is often used to refer to a preconceived (usually unfavourable) evaluation or classifi ...
on the part of the lawyers, the judge, or jury members threatens to destroy the court's credibility. Some people argue that the often Byzantine rules governing courtroom conduct and processes restrict a layman's ability to participate, essentially reducing the legal process to a battle between the lawyers. In this case, the criticism is that the decision is based less on sound justice and more on the lawyer's eloquence and
charisma
() is a personal quality of magnetic charm, persuasion, or appeal.
In the fields of sociology and political science, psychology, and management, the term ''charismatic'' describes a type of leadership.
In Christian theology, the term ''chari ...
. This is a particular problem when the lawyer performs in a substandard manner. The jury process is another area of frequent criticism, as there are few mechanisms to guard against poor judgment or incompetence on the part of the layman jurors. Judges themselves are very subject to bias subject to things as ordinary as the length of time since their last break.
Manipulations of the court system by defense and prosecution attorneys, law enforcement as well as the defendants have occurred and there have been cases where justice was denied.
Corrections and rehabilitation

Offenders are then turned over to the correctional authorities, from the court system after the accused has been found guilty. Like all other aspects of criminal justice, the administration of
punishment
Punishment, commonly, is the imposition of an undesirable or unpleasant outcome upon an individual or group, meted out by an authority—in contexts ranging from child discipline to criminal law—as a deterrent to a particular action or beh ...
has taken many different forms throughout history. Early on, when civilizations lacked the resources necessary to construct and maintain prisons,
exile
Exile or banishment is primarily penal expulsion from one's native country, and secondarily expatriation or prolonged absence from one's homeland under either the compulsion of circumstance or the rigors of some high purpose. Usually persons ...
and
execution
Capital punishment, also known as the death penalty and formerly called judicial homicide, is the state-sanctioned killing of a person as punishment for actual or supposed misconduct. The sentence ordering that an offender be punished in ...
were the primary forms of punishment. Historically
shame
Shame is an unpleasant self-conscious emotion often associated with negative self-evaluation; motivation to quit; and feelings of pain, exposure, distrust, powerlessness, and worthlessness.
Definition
Shame is a discrete, basic emotion, d ...
punishments and
exile
Exile or banishment is primarily penal expulsion from one's native country, and secondarily expatriation or prolonged absence from one's homeland under either the compulsion of circumstance or the rigors of some high purpose. Usually persons ...
have also been used as forms of censure.
The most publicly visible form of punishment in the modern era is the
prison
A prison, also known as a jail, gaol, penitentiary, detention center, correction center, correctional facility, or remand center, is a facility where Prisoner, people are Imprisonment, imprisoned under the authority of the State (polity), state ...
. Prisons may serve as detention centers for prisoners after trial. For containment of the accused, jails are used. Early prisons were used primarily to sequester criminals and little thought was given to living conditions within their walls. In America, the
Quaker
Quakers are people who belong to the Religious Society of Friends, a historically Protestant Christian set of denominations. Members refer to each other as Friends after in the Bible, and originally, others referred to them as Quakers ...
movement is commonly credited with establishing the idea that prisons should be used to reform criminals. This can be seen as a critical moment in the debate regarding the purpose of punishment.
Punishment (in the form of prison time) may serve a variety of purposes. First, and most obviously, the incarceration of criminals removes them from the general population and inhibits their ability to perpetrate further crimes. A new goal of prison punishments is to offer criminals a chance to be rehabilitated. Many modern prisons offer schooling or job training to prisoners as a chance to learn a vocation and thereby earn a legitimate living when they are returned to society. Religious institutions also have a presence in many prisons, with the goal of teaching ethics and instilling a sense of morality in the prisoners. If a prisoner is released before his time is served, he is released as a parole. This means that they are released, but the restrictions are greater than that of someone on probation.
There are numerous other forms of punishment which are commonly used in conjunction with or in place of prison terms. Monetary
fines Fines may refer to:
*Fines, Andalusia, Spanish municipality
*Fine (penalty)
* Fine, a dated term for a Lease#Leases_of_land, premium on a lease of land, a large sum the tenant pays to commute (lessen) the rent throughout the term
* Fines, ore or oth ...
are one of the oldest forms of punishment still used today. These fines may be paid to the state or to the victims as a form of reparation.
Probation
Probation in criminal law is a period of supervision over an offence (law), offender, ordered by the court often in lieu of incarceration. In some jurisdictions, the term ''probation'' applies only to community sentences (alternatives to incar ...
and
house arrest
House arrest (also called home confinement, or nowadays electronic monitoring) is a legal measure where a person is required to remain at their residence under supervision, typically as an alternative to imprisonment. The person is confined b ...
are also sanctions which seek to limit a person's mobility and his or her opportunities to commit crimes without actually placing them in a prison setting. Furthermore, many jurisdictions may require some form of public or community service as a form of reparations for lesser offenses. In Corrections, the department ensures court-ordered, pre-sentence chemical dependency assessments, related Drug Offender Sentencing Alternative specific examinations and treatment will occur for offenders sentenced to Drug Offender Sentencing Alternative in compliance with RCW 9.94A.660.
Execution or
capital punishment
Capital punishment, also known as the death penalty and formerly called judicial homicide, is the state-sanctioned killing of a person as punishment for actual or supposed misconduct. The sentence (law), sentence ordering that an offender b ...
is still used around the world. Its use is one of the most heavily debated aspects of the criminal justice system. Some societies are willing to use executions as a form of political control, or for relatively minor misdeeds. Other societies reserve execution for only the most sinister and brutal offenses. Others still have discontinued the practice entirely, accepting the use of execution to be excessively cruel and/or irreversible in case of an erroneous conviction.
Academic discipline
The functional study of criminal justice is at times distinct from
criminology
Criminology (from Latin , 'accusation', and Ancient Greek , ''-logia'', from λόγος ''logos'', 'word, reason') is the interdisciplinary study of crime and deviant behaviour. Criminology is a multidisciplinary field in both the behaviou ...
, which involves the study of crime as a social phenomenon, causes of crime, criminal behavior, and other aspects of crime; although in most cases today, criminal justice as a
field of study
An academic discipline or academic field is a subdivision of knowledge that is taught and researched at the college or university level. Disciplines are defined (in part) and recognized by the academic journals in which research is published, a ...
is used as a synonym for criminology and the
sociology of law
The sociology of law, legal sociology, or law and society, is often described as a sub-discipline of sociology or an interdisciplinary approach within legal studies. Some see sociology of law as belonging "necessarily" to the field of sociolo ...
. It emerged as an academic discipline in the 1920s, beginning with
Berkeley police chief
August Vollmer who established a criminal justice program at the
University of California, Berkeley
The University of California, Berkeley (UC Berkeley, Berkeley, Cal, or California), is a Public university, public Land-grant university, land-grant research university in Berkeley, California, United States. Founded in 1868 and named after t ...
in 1916. Vollmer's work was carried on by his student,
O.W. Wilson, who led efforts to professionalize policing and reduce
corruption
Corruption is a form of dishonesty or a criminal offense that is undertaken by a person or an organization that is entrusted in a position of authority to acquire illicit benefits or abuse power for one's gain. Corruption may involve activities ...
. Other programs were established in the United States at
Indiana University
Indiana University (IU) is a state university system, system of Public university, public universities in the U.S. state of Indiana. The system has two core campuses, five regional campuses, and two regional centers under the administration o ...
,
Michigan State University
Michigan State University (Michigan State or MSU) is a public university, public Land-grant university, land-grant research university in East Lansing, Michigan, United States. It was founded in 1855 as the Agricultural College of the State o ...
,
San Jose State University
San José State University (San Jose State or SJSU) is a Public university, public research university in San Jose, California. Established in 1857, SJSU is the List of oldest schools in California, oldest public university on the West Coast of ...
, and the
University of Washington
The University of Washington (UW and informally U-Dub or U Dub) is a public research university in Seattle, Washington, United States. Founded in 1861, the University of Washington is one of the oldest universities on the West Coast of the Uni ...
.
As of 1950, criminal justice students were estimated to number less than 1,000. Until the 1960s, the primary focus of criminal justice in the United States was on policing and police science.
Throughout the 1960s and 1970s, crime rates soared and social issues took center stage in the public eye. A number of new laws and studies focused federal resources on researching new approaches to crime control. The
Warren Court
The Warren Court was the period in the history of the Supreme Court of the United States from 1953 to 1969 when Earl Warren served as the chief justice. The Warren Court is often considered the most liberal court in U.S. history.
The Warren Cou ...
(the
Supreme Court
In most legal jurisdictions, a supreme court, also known as a court of last resort, apex court, high (or final) court of appeal, and court of final appeal, is the highest court within the hierarchy of courts. Broadly speaking, the decisions of ...
under
Chief Justice Earl Warren
Earl Warren (March 19, 1891 – July 9, 1974) was an American attorney and politician who served as the 30th governor of California from 1943 to 1953 and as the 14th Chief Justice of the United States from 1953 to 1969. The Warren Court presid ...
), issued a series of rulings which redefined citizen's rights and substantially altered the powers and responsibilities of police and the courts. The Civil Rights Era offered significant legal and ethical challenges to the ''
status quo
is a Latin phrase meaning the existing state of affairs, particularly with regard to social, economic, legal, environmental, political, religious, scientific or military issues. In the sociological sense, the ''status quo'' refers to the curren ...
''.
In the late 1960s, with the establishment of the
Law Enforcement Assistance Administration
The Law Enforcement Assistance Administration (LEAA) was a U.S. federal agency within the United States Department of Justice. It administered federal funding to state and local law enforcement agencies and funded educational programs, research, ...
(LEAA) and associated policy changes that resulted with the
Omnibus Crime Control and Safe Streets Act of 1968
The Omnibus Crime Control and Safe Streets Act of 1968 (, codified at ''et seq.'') was legislation passed by the Congress of the United States and signed into law by President Lyndon B. Johnson that established the Law Enforcement Assistance A ...
. The LEAA provided
grants
Grant or Grants may refer to:
People
* Grant (given name), including a list of people and fictional characters
* Grant (surname), including a list of people and fictional characters
** Ulysses S. Grant (1822–1885), the 18th president of the U ...
for criminology research, focusing on social aspects of crime. By the 1970s, there were 729 academic programs in criminology and criminal justice in the United States.
Largely thanks to th
Law Enforcement Education Program criminal justice students numbered over 100,000 by 1975. Over time, scholars of criminal justice began to include
criminology
Criminology (from Latin , 'accusation', and Ancient Greek , ''-logia'', from λόγος ''logos'', 'word, reason') is the interdisciplinary study of crime and deviant behaviour. Criminology is a multidisciplinary field in both the behaviou ...
,
sociology
Sociology is the scientific study of human society that focuses on society, human social behavior, patterns of Interpersonal ties, social relationships, social interaction, and aspects of culture associated with everyday life. The term sociol ...
, and
psychology
Psychology is the scientific study of mind and behavior. Its subject matter includes the behavior of humans and nonhumans, both consciousness, conscious and Unconscious mind, unconscious phenomena, and mental processes such as thoughts, feel ...
, among others, to provide a more comprehensive view of the criminal justice system and the root causes of crime. Criminal justice studies now combine the practical and technical policing skills with a study of social deviance as a whole.
Criminal justice degrees are offered at both the two-year community college and four-year university level. Community college criminal justice programs include the Associate of Arts (AA), Associate of Science (AS), and the Associate of Applied Science (AAS) degrees. Criminal justice degree programs at four-year institutions typically include coursework in statistics, methods of research, criminal justice, policing, U.S. court systems, criminal courts, corrections, community corrections, criminal procedure, criminal law, victimology, juvenile justice, and a variety of special topics. A number of universities offer, bachelor's, academic minors, graduate certificates, master's, and doctoral degrees in Criminal Justice; Criminology, Law and Society;
Administration of Justice
The administration of justice is the process by which the legal system of a government is executed. The presumed goal of such an administration is to provide justice for all those accessing the legal system.
Australia
In ''Attorney General for ...
; or a specially designated
Bachelor of Criminal Justice degree.
Theories of criminal justice
Theories of criminal justice include
utilitarian justice,
retributive justice
Retributive justice is a legal concept whereby the criminal offender receives punishment proportional or similar to the crime. As opposed to revenge, retribution—and thus retributive justice—is not personal, is directed only at wrongdoing, ...
,
restorative justice
Restorative justice is a community-based approach to justice that aims to repair the harm done to victims, offenders and communities. In doing so, restorative justice practitioners work to ensure that offenders take responsibility for their ac ...
. They can work through
deterrence,
rehabilitation or
incapacitation.
History

The modern criminal justice system has evolved since
ancient
Ancient history is a time period from the beginning of writing and recorded human history through late antiquity. The span of recorded history is roughly 5,000 years, beginning with the development of Sumerian cuneiform script. Ancient h ...
times, with new forms of
punishment
Punishment, commonly, is the imposition of an undesirable or unpleasant outcome upon an individual or group, meted out by an authority—in contexts ranging from child discipline to criminal law—as a deterrent to a particular action or beh ...
, added
rights
Rights are law, legal, social, or ethics, ethical principles of freedom or Entitlement (fair division), entitlement; that is, rights are the fundamental normative rules about what is allowed of people or owed to people according to some legal sy ...
for
offenders and victims, and
policing
The police are a constituted body of people empowered by a state with the aim of enforcing the law and protecting the public order as well as the public itself. This commonly includes ensuring the safety, health, and possessions of citizen ...
reforms. These developments have reflected changing
customs
Customs is an authority or Government agency, agency in a country responsible for collecting tariffs and for controlling International trade, the flow of goods, including animals, transports, personal effects, and hazardous items, into and out ...
, political ideals, and economic conditions. In ancient times through the Middle Ages,
exile
Exile or banishment is primarily penal expulsion from one's native country, and secondarily expatriation or prolonged absence from one's homeland under either the compulsion of circumstance or the rigors of some high purpose. Usually persons ...
was a common form of punishment. During the
Middle Ages
In the history of Europe, the Middle Ages or medieval period lasted approximately from the 5th to the late 15th centuries, similarly to the post-classical period of global history. It began with the fall of the Western Roman Empire and ...
, payment to the victim (or the victim's family), known as
wergild, was another common punishment, including for violent crimes. For those who could not afford to buy their way out of punishment, harsh penalties included various forms of
corporal punishment
A corporal punishment or a physical punishment is a punishment which is intended to cause physical pain to a person. When it is inflicted on Minor (law), minors, especially in home and school settings, its methods may include spanking or Padd ...
. These included
mutilation
Mutilation or maiming (from the ) is Bodily harm, severe damage to the body that has a subsequent harmful effect on an individual's quality of life.
In the modern era, the term has an overwhelmingly negative connotation, referring to alteratio ...
,
branding, and
flogging
Flagellation (Latin , 'whip'), flogging or whipping is the act of beating the human body with special implements such as whips, rods, switches, the cat o' nine tails, the sjambok, the knout, etc. Typically, flogging has been imposed ...
, as well as
execution
Capital punishment, also known as the death penalty and formerly called judicial homicide, is the state-sanctioned killing of a person as punishment for actual or supposed misconduct. The sentence ordering that an offender be punished in ...
.
Though a prison,
Le Stinche, existed as early as the 14th century in
Florence
Florence ( ; ) is the capital city of the Italy, Italian region of Tuscany. It is also the most populated city in Tuscany, with 362,353 inhabitants, and 989,460 in Metropolitan City of Florence, its metropolitan province as of 2025.
Florence ...
,
incarceration
Imprisonment or incarceration is the restraint of a person's liberty for any cause whatsoever, whether by authority of the government, or by a person acting without such authority. In the latter case it is considered " false imprisonment". Impri ...
was not widely used until the 19th century. Correctional reform in the United States was first initiated by
William Penn
William Penn ( – ) was an English writer, religious thinker, and influential Quakers, Quaker who founded the Province of Pennsylvania during the British colonization of the Americas, British colonial era. An advocate of democracy and religi ...
, towards the end of the 17th century. For a time,
Pennsylvania
Pennsylvania, officially the Commonwealth of Pennsylvania, is a U.S. state, state spanning the Mid-Atlantic (United States), Mid-Atlantic, Northeastern United States, Northeastern, Appalachian, and Great Lakes region, Great Lakes regions o ...
's criminal code was revised to forbid
torture
Torture is the deliberate infliction of severe pain or suffering on a person for reasons including corporal punishment, punishment, forced confession, extracting a confession, interrogational torture, interrogation for information, or intimid ...
and other forms of cruel punishment, with
jail
A prison, also known as a jail, gaol, penitentiary, detention center, correction center, correctional facility, or remand center, is a facility where people are imprisoned under the authority of the state, usually as punishment for various cr ...
s and
prison
A prison, also known as a jail, gaol, penitentiary, detention center, correction center, correctional facility, or remand center, is a facility where Prisoner, people are Imprisonment, imprisoned under the authority of the State (polity), state ...
s replacing corporal punishment. These reforms were reverted, upon Penn's death in 1718. Under pressure from a group of
Quakers
Quakers are people who belong to the Religious Society of Friends, a historically Protestantism, Protestant Christian set of Christian denomination, denominations. Members refer to each other as Friends after in the Bible, and originally ...
, these reforms were revived in Pennsylvania toward the end of the 18th century, and led to a marked drop in Pennsylvania's crime rate.
Patrick Colquhoun,
Henry Fielding
Henry Fielding (22 April 1707 – 8 October 1754) was an English writer and magistrate known for the use of humour and satire in his works. His 1749 comic novel ''The History of Tom Jones, a Foundling'' was a seminal work in the genre. Along wi ...
and others led significant reforms during the late eighteenth and early nineteenth centuries.
The development of a modern criminal justice system was contemporary to the formation of the concept of a nation-state, later defined by German sociologist
Max Weber
Maximilian Carl Emil Weber (; ; 21 April 186414 June 1920) was a German Sociology, sociologist, historian, jurist, and political economy, political economist who was one of the central figures in the development of sociology and the social sc ...
as establishing a "
monopoly on the legitimate use of physical force
In political philosophy, a monopoly on violence or monopoly on the legal use of force is the property of a polity that is the only entity in its jurisdiction to legitimately use force, and thus the supreme authority of that area.
While the mon ...
", which was exercised in the criminal justice case by the police.
Modern police
The first modern police force is commonly said to be the
Metropolitan Police in
London
London is the Capital city, capital and List of urban areas in the United Kingdom, largest city of both England and the United Kingdom, with a population of in . London metropolitan area, Its wider metropolitan area is the largest in Wester ...
, established in 1829 by Sir
Robert Peel
Sir Robert Peel, 2nd Baronet (5 February 1788 – 2 July 1850), was a British Conservative statesman who twice was Prime Minister of the United Kingdom (1834–1835, 1841–1846), and simultaneously was Chancellor of the Exchequer (1834–183 ...
. Based on the
Peelian principles, it promoted the
preventive role of police as a deterrent to urban
crime
In ordinary language, a crime is an unlawful act punishable by a State (polity), state or other authority. The term ''crime'' does not, in modern criminal law, have any simple and universally accepted definition,Farmer, Lindsay: "Crime, definiti ...
and disorder.
In the United States, police departments were first established in
Boston
Boston is the capital and most populous city in the Commonwealth (U.S. state), Commonwealth of Massachusetts in the United States. The city serves as the cultural and Financial centre, financial center of New England, a region of the Northeas ...
in 1838, and
New York City
New York, often called New York City (NYC), is the most populous city in the United States, located at the southern tip of New York State on one of the world's largest natural harbors. The city comprises five boroughs, each coextensive w ...
in 1844. Early on, police were not respected by the community, as
corruption
Corruption is a form of dishonesty or a criminal offense that is undertaken by a person or an organization that is entrusted in a position of authority to acquire illicit benefits or abuse power for one's gain. Corruption may involve activities ...
was rampant.
In the 1920s, led by
Berkeley, California
Berkeley ( ) is a city on the eastern shore of San Francisco Bay in northern Alameda County, California, United States. It is named after the 18th-century Anglo-Irish bishop and philosopher George Berkeley. It borders the cities of Oakland, Cali ...
, police chief,
August Vollmer and
O.W. Wilson, police began to professionalize, adopt new technologies, and place emphasis on training and professional qualifications of new hires. Despite such reforms, police agencies were led by highly autocratic leaders, and there remained a lack of respect between police and the community. Following urban unrest in the 1960s, police placed more emphasis on community relations, enacted reforms such as increased diversity in hiring, and many police agencies adopted
community policing
Community policing is a philosophy and organizational strategy whereby law enforcement cooperates with community groups and citizens in producing safety and security. The theory underlying community policing is that it makes citizens more likely t ...
strategies.
In the 1990s,
CompStat
CompStat (also written COMPSTAT) is a police management system created by the New York City Police Department in 1994 with assistance from the New York City Police Foundation. Today, variations of the system are used in police departments worldwid ...
was developed by the
New York Police Department
The City of New York Police Department, also referred to as New York City Police Department (NYPD), is the primary law enforcement agency within New York City. Established on May 23, 1845, the NYPD is the largest, and one of the oldest, munic ...
as an information-based system for tracking and
mapping crime patterns and trends, and holding police accountable for dealing with crime problems. CompStat has since been replicated in police departments across the United States and around the world, with
problem-oriented policing
Problem-oriented policing (POP), coined by University of Wisconsin–Madison professor Herman Goldstein, is a policing strategy that involves the identification and analysis of specific crime and disorder problems, in order to develop effective r ...
,
intelligence-led policing, and other information-led policing strategies also adopted.
Criminal Justice Overview.
Criminal justice is a multifaceted system that includes laws, courts, and corrections. Its purpose is to uphold societal norms by enforcing laws and punishing offenders. The criminal justice system strives to maintain order and protect citizens from harm.
The Role of Criminal Law
Criminal law is essential for defining crimes, determining punishments, and ensuring fair trials. It provides a framework for holding individuals accountable for their actions while protecting individual rights. Without criminal law, society would lack an organized means of addressing wrongdoing.
Justice for All.
"Criminal justice for all" emphasizes the principle that every person should be treated fairly under the law. This concept promotes fairness, impartiality, and equal access to justice regardless of background or social status. The pursuit of justice for all enhances the integrity and legitimacy of the criminal justice system.
[Deborah Turkheimer Vol. 66, No. 1 (Autumn 2016) Published by the Association of American Law Schools: https://www.jstor.org/stable/26402415
Kumaralingam Amirthalingam Singapore Journal of Legal Studies (Sep 2017) Published by the National University of Singapore (Faculty of Law):https://www.jstor.org/stable/44986460 ]
By country
France
See also
*
Outline of criminal justice – structured list of topics related to criminal justice, organized by subject area
*
Criminal justice ethics
*
Criminal justice reform
*
Academy of Criminal Justice Sciences
*
Criminal responsibility in French law
*
American Society of Criminology
The American Society of Criminology (ASC) is an international organization based on the campus of Ohio State University whose members focus on the study of crime and delinquency. It aims to grow and disseminate scholarly research, with members wo ...
*
Insanity defense
The insanity defense, also known as the mental disorder defense, is an affirmative Defense (legal), defense by excuse in a criminal case, arguing that the defendant is not responsible for their actions due to a mental illness, psychiatric disease ...
*
Intoxication defense
In criminal law, the intoxication defense is a defense (legal), defense by which a defendant may claim diminished responsibility on the basis of substance intoxication. Where a crime requires a certain mental state (''mens rea'') to break the ...
*
Penal populism
*
Prison reform
Prison reform is the attempt to improve conditions inside prisons, improve the effectiveness of a penal system, reduce recidivism or implement alternatives to incarceration. It also focuses on ensuring the reinstatement of those whose lives are ...
*
Public criminology
*
Recidivism
Recidivism (; from 'recurring', derived from 'again' and 'to fall') is the act of a person repeating an undesirable behavior after they have experienced negative consequences of that behavior, or have been trained to Extinction (psycholo ...
References
Works cited
*
Further reading
* Dale, Elizabeth. ''Criminal Justice in the United States, 1789–1939'' (Cambridge University Press, 2011)184 pp
* Fuller, John Randolph. ''Criminal Justice: Mainstream and Crosscurrents'' 2005. Prentice Hall. Upper Saddle River, NJ.
*
Serge Guinchard and Jacques Buisson. ''Criminal procedural law in France'' Lexinexis editor, 7th edition, September 2011, 1584 pages.
* Hanes, Richard C. and Sharon M. Hanes. Crime and Punishment in America. Volume 1. 2005. Thomas Gale. Farmington Hills, MI
* Friedman, Lawrence M. Crime and Punishment in American History. 1993. Basic Books. New York, NY.
* Sunga, Lyal S. ''The Emerging System of International Criminal Law: Developments in Codification and Implementation''. 1997. Kluwer Law International. The Hague, The Netherlands.
* Walker, Samuel Popular Justice: A History of American Criminal Justice. 1980. Oxford University Press, Inc. New York
External links
Academy of Criminal Justice SciencesThe International Center for Transitional Justice's (ICTJ) Criminal Justice PageScottish Centre for Crime and Justice Research an academic research centre focusing on crime and justice issues.
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