A cold case is a
crime, or a suspected crime, that has not yet been fully resolved and is not the subject of a current
criminal investigation, but for which new information could emerge from new witness testimony, re-examined archives, new or retained material evidence, or fresh activities of a suspect. New technological methods developed after the crime was committed can be used on the surviving evidence to analyse causes, often with conclusive results.
Characteristics
Violent or major crime
Typically, cold cases are
violent and other major
felony crimes, such as
murder
Murder is the unlawful killing of another human without justification (jurisprudence), justification or valid excuse (legal), excuse, especially the unlawful killing of another human with malice aforethought. ("The killing of another person wit ...
and
rape, which—unlike unsolved minor crimes—are generally not subject to a
statute of limitations.
Sometimes disappearances can also be considered cold cases if the victim has not been seen or heard from for some time, such as the case of
Natalee Holloway or the
Beaumont children
Jane Nartare Beaumont (born 10 September 1956), Arnna Kathleen Beaumont (born 11 November 1958) and Grant Ellis Beaumont (born 12 July 1961), collectively known as the Beaumont children, were three Australian siblings who disappeared from Glen ...
.
About 35% of those cases are not cold cases at all. Some cases become instantly cold when a seeming closed (solved) case is re-opened due to the discovery of new evidence pointing away from the original suspect(s). Other cases are cold when the crime is discovered well after the fact—for example, by the discovery of human remains. Some cases become classified cold cases when a case that had been originally ruled an accident or suicide is re-designated as murder when new evidence emerges.
The
John Christie murders is a notable case when
Timothy Evans was wrongly executed for the alleged murders of his wife and child. Many other bodies were later found in the house where they lived with Christie, and he was then executed for the crimes. The case helped a campaign against
capital punishment in Britain.
Identifying a suspect
A case is considered unsolved until a
suspect
In law enforcement jargon, a suspect is a known person accused or suspected of committing a crime. Police and reporters in the United States often use the word suspect as a jargon when referring to the perpetrator of the offense (perp in dated U ...
has been identified,
charged, and
tried for the crime. A case that goes to trial and does not result in a
conviction can also be kept on the books pending new
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 ...
.
In some cases, a suspect, often called a "person of interest" or "subject" is identified early on but no evidence definitively linking the subject to the crime is found at that time and more often than not the subject is not forthcoming with a confession. This often happens in cases where the subject has an
alibi, alibi witnesses, or lack of forensic evidence. Eventually, the alibi is disproved, the witnesses recanted their statements or advances in forensics helped bring the subjects to justice.
Sometimes a case is not solved but forensic evidence helps to determine that the crimes are
serial crimes. The
BTK case and
Original Night Stalker (the latter pending trial as of April 24, 2018) cases are such examples. The
Texas Rangers have established a website in the hopes that it shall elicit new information and investigative leads.
Tunnel vision
Sometimes, a viable suspect has been overlooked or simply ignored due to then-flimsy circumstantial evidence, the presence of a likelier suspect (who is later proven to be innocent), or a tendency of investigators to zero in on someone else to the exclusion of other possibilities (which goes back to the likelier suspect angle)—known as "
tunnel vision".
Improvements in forensics
With the advent of and improvements to
DNA testing and 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 crimina ...
technology, many cold cases are being re-opened and
prosecuted.
Police departments are opening cold case units whose job is to re-examine cold case files. DNA evidence helps in such cases but as in the case of fingerprints, it is of no value unless there is evidence on file to compare it to.
Famous criminal examples

The identity of
Jack the Ripper is a notorious example of an outstanding cold case, with numerous
suggestions as to the identity of the
serial killer. Similarly, the
Zodiac Killer has been studied extensively for almost 50 years, with numerous suspects discussed and debated. The perpetrators of the
Wall Street bombing of 1920 have never been positively identified, though the
Galleanists, a group of
Italian anarchists, are widely believed to have planned the explosion. The
burning of the Reichstag building
The Reichstag (, ; officially: – ; en, Parliament) is a historic government building in Berlin which houses the Bundestag, the lower house of Germany's parliament.
It was constructed to house the Imperial Diet (german: Reichstag) of the ...
in 1933 remains controversial and although
Marinus van der Lubbe was tried, convicted and executed for
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, wat ...
, it is possible that the Reichstag fire was perpetrated by the
Nazis to enhance their power and destroy democracy in Germany.
Examples of criminal cold cases that ended in conviction
1940s
1950s
1960s
1970s
1980s
1990s
2000s
Examples without conviction, but considered solved or likely solved
1910s
1960s
1970s
1980s
1990s
2000s
Examples of unsolved criminal cold cases
In popular culture
Film
* In the movie ''
Max Payne
''Max Payne'' is a neo-noir third-person shooter video game series developed by Remedy Entertainment (''Max Payne'' and ''Max Payne 2'') and Rockstar Studios (''Max Payne 3''). The series is named after its protagonist, Max Payne, a New York Ci ...
'', Detective Max Payne works in Cold Case,
NYPD
Literature
The phrase "Cold Case" is found in a number of story and book titles. Examples include:
* L.L. Bartlett (2010). "Cold Case". A Jeff Resnick Mystery. . Polaris Press. This short story inspired the fourth Jeff Resnick book, ''Bound by Suggestion''.
*
True crime.
* A
children's book/mystery.
* An
urban novel.
* An education and reference book.
*
*
Music
* ''
Cold Case Files'' (2008) and ''
Cold Case Files Vol. 2
Onyx is an American hardcore hip hop group from South Jamaica, Queens, New York City, formed in 1988 by Fredro Starr, Suavé (also known as Sonny Seeza) and the late Big DS. Sticky Fingaz joined the group in 1991.
They are best known for thei ...
'' (2012) are compilation albums by the rap group
Onyx
* "Cold Case Love" is a song on
Rihanna
Robyn Rihanna Fenty ( ; born February 20, 1988) is a Barbadian singer, actress, and businesswoman. Born in Saint Michael and raised in Bridgetown, Barbados, Rihanna auditioned for American record producer Evan Rogers who invited her to the ...
's ''
Rated R'' album, released November 23, 2009 on the
Def Jam
Def Jam Recordings (also simply known as Def Jam) is an American multinational record label owned by Universal Music Group. It is based in Manhattan, New York City, specializing predominantly in hip hop, contemporary R&B, soul and pop.
The ...
label
* "Stella: The Cold Case" is an
EP by
Television
* The Canadian television series ''
Cold Squad'' (1998–2005), the British television series ''
Waking the Dead'' (2000–2011) and the US television series ''
Cold Case'' (2003–2010) all follow groups of fictional homicide detectives who investigate cold cases. They are set in
Vancouver,
London and
Philadelphia, respectively.
* ''
Cold Case Files'' (1999–2006) is a documentary-style television series recounting actual solved cold cases.
* ''
New Tricks'' is a
BBC series revolving around retired
CID officers acting as
consultant
A consultant (from la, consultare "to deliberate") is a professional (also known as ''expert'', ''specialist'', see variations of meaning below) who provides advice and other purposeful activities in an area of specialization.
Consulting servic ...
s to serving officers and investigating unsolved cold cases.
* ''
Unforgotten is a
ITV
ITV or iTV may refer to:
ITV
*Independent Television (ITV), a British television network, consisting of:
** ITV (TV network), a free-to-air national commercial television network covering the United Kingdom, the Isle of Man, and the Channel Islan ...
, DCI Cassie Stuart (
Nicola Walker) and DI Sunny Khan (
Sanjeev Bhaskar), as they solve cold cases of disappearance and murder.
Video game
* ''
Chase: Cold Case Investigations - Distant Memories'' is a video game about two detectives of the
Tokyo Metropolitan Police Department's cold case unit, Shounosuke Nanase and Koto Amekura.
See also
*
Clearance rate
*
FBI Victims Identification Project
*
Forensic engineering
*
Forensic photography
*
Forensic science
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 ...
*
Genealogical DNA test
References
External links
Cold Case Investigation UnitsTELEMASP Bulletin, Texas Law Enforcement Management and Administrative Statistics Program
* {{cite news, last=Wagner, first=Adam, title=Why Stephen Lawrence's killers were sentenced as juveniles, url=https://www.theguardian.com/law/2012/jan/04/stephen-lawrence-killers-sentenced-juveniles, access-date=2012-01-04, newspaper=
The Guardian, date=2012-01-04 – ''explains sentencing in the UK, for cases that took place long ago.''
Cold Case Website
Criminal investigation