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purpose
examines why so many murders in the United States remain unsolved. It argues that unsolved murders are caused by several factors
argument
Unsolved murders are not simply a result of limited police technology or resources. They are also a social problem involving distrust, lack of cooperation, investigative challenges, and offenders who deliberately avoid detection.
A. The problem of unsolved murders
The chapter estimates that the United States has at least 250,000 unsolved murders, with other databases suggesting more than 330,000.
Approximately 6,000 additional unsolved murders are added each year.
In 2020, only approximately 50% of murders were cleared by arrest.
The author argues that unsolved murders are a serious failure of the criminal justice system.
Why unsolved murders matters:
Families and friends of victims, referred to as homicide covictims, are left without answers or legal closure.
Families may experience prolonged grief and trauma.
Offenders are not held accountable and may remain free to commit additional crimes.
Unsolved cases can damage public confidence in the criminal justice system.
Todd Kohlhepp: An example of an unsolved murder case
The chapter uses Todd Kohlhepp to demonstrate how one offender can be responsible for multiple murders that remain undiscovered for years.
In 2003, four people were murdered at a motorcycle shop in Chesnee, South Carolina.
The murders remained unsolved for 13 years.
In 2016, police discovered a missing woman being held at Kohlhepp's property.
The investigation led to the discovery of additional murder victims.
Kohlhepp eventually confessed to the 2003 quadruple homicide.
He was also connected to a kidnapping and sexual assault he committed as a juvenile.
Why Kohlhepp’s case is important
Kohlhepp had a history of serious criminal behaviour beginning in childhood.
His earlier criminal history did not prevent him from committing further offences after his release.
The 2003 murders were solved largely because of an unexpected confession.
Without the discovery of the missing woman and Kohlhepp's confession, several murders might have remained unsolved.
Why are murders becoming harder to solve?
changes in offender-victim relationship
poor relationships between communities and police
unequal investigative attention
location of the murder
changes in relationship
Historically, many murders involved family members, intimate partners, or acquaintances.
These relationships could provide investigators with potential suspects and motives.
More murders now involve strangers, making it harder to identify connections between victims and offenders.
location of the murder
Murders committed in remote locations can be difficult to solve because there may be fewer witnesses and less available information.
Large cities also experience challenges because of the volume of crime and difficulties obtaining cooperation.
A study examining homicide data from 1976–2001 found differences in clearance rates depending on victim age and location.
Category | Percentage of murders unsolved |
|---|---|
Victims aged 13 and under | 13% |
Victims aged 14–17 | 29% |
Victims aged 18–24 | 32% |
Victims aged 25–34 | Over 30% |
White victims | Over 27% |
Black victims | Nearly 31% |
Large cities | 37% |
Medium-sized cities | 31% |
Small cities | 22% |
Suburban areas | 26% |
important clearance rate takeaway
Murders involving younger victims and murders in rural areas were more likely to be solved in the study. Cases involving older victims and those in large cities were less likely to be solved.
Racial differences in homicide clearance rates
Murders involving white victims were consistently solved at higher rates than murders involving minority victims.
In 2015, approximately 90% of murders involving white victims were cleared, compared with approximately 40% involving minority victims.
Minority victim cases had 43% lower odds of being solved.
Cases involving male victims had 42% lower odds of being solved.
Community disorder complaints were associated with 31% lower odds of a case being solved.
chicago example
Approximately 95% of homicide offenders and victims were Black or Hispanic.
More than half of both homicide offenders and victims were gang-affiliated.
Nearly 80% had previous arrests.
Only approximately 26% of murders were cleared by arrest.
Only approximately 5% of non-fatal shootings were cleared by arrest.
Normal versus abnormal homicides
Normal homicides | Abnormal homicides |
|---|---|
Often result from everyday conflicts or interactions. | May involve unusual offender motivations and clinically significant psychopathology. |
Often involve people who know each other. | May involve strangers and sexually motivated offending. |
Motives and relationships may be easier to establish. | Can involve complex behaviours that make investigations more difficult. |
rate of sexual homicides
sexual homicides account for slightly less than 1% of all murders in the United States, based on research examining FBI data from 1976–2011.
Why sexual homicides are difficult to solve
forensic awareness
multiple crime scenes
changing methods of offending
remote locations
Front-end versus back-end investigation
Front-end: The initial crime scene, abduction location, evidence, witnesses, and possible motives.
Back-end: Locations where offenders leave or dispose of victims' bodies.
bundy’s argument
investigators should consider both aspects of a crime rather than focusing almost entirely on the initial crime scene.
Offenders can change their methods
Experienced serial offenders may change their behaviour to avoid being connected to previous crimes.
Investigators who rely too heavily on one offender profile or one particular pattern may overlook connections between cases.
This is described as linkage blindness.
confessions can be valuable
The author argues that serial offenders may have committed crimes that investigators cannot connect through physical evidence alone.
Confessions and offender interviews can therefore help identify additional victims and solve older cases.
multiple crime scenes matter
Bundy's accounts illustrated that one homicide could involve several important locations.
Investigating only the original abduction or attack location could leave important evidence undiscovered.