Study Says Most Crime Not Linked To Mental Illness


It’s an association constantly made in TV,
film and media: a link between crime and mental illness. “He has a criminal record and history of mental
illness.” (Via WMBF) “Wood was suffering from mental illness, drug
withdrawal, intoxication and psychological instability.” (Via KRGV) “What happened at her son’s home evolved out
of a mental illness he developed while in Afghanistan.” (Via KENS) “Dunkle’s attorney says Dunkle suffers with
(sic) alcoholism and mental illness and has been diagnosed with depression and bipolar
disorder.” (Via WSYX) But a new study published by the American
Psychological Association suggests this connection could be largely sensationalized. The study found that only 7.5 percent of crimes
committed by people with a serious mental disorder were directly related to symptoms
of their mental illness. The lead researcher explains: ​”When we
hear about crimes committed by people with mental illness, they tend to be big headline-making
crimes so they get stuck in people’s heads. The vast majority of people with mental illness
are not violent, not criminal and not dangerous.” Some of these “headline-making crimes” that
have been linked with mental illness include traumatic national tragedies: Columbine, the
Fort Hood shootings, the Aurora, Col., theater shooting, Virginia Tech, Sandy Hook. Take this 2004 Slate story profiling the teenage
Columbine killers, for example. It’s there in the headline: “The Depressive and the Psychopath.” But for most of the subjects, the study didn’t
find a valid pattern connecting mental illness and crime over long periods of time. ​Here’s what the researchers looked at.
They examined 429 crimes performed by 143 defendants of a mental health court through
documents and interviews, focusing on three types of mental illness: major depression,
schizophrenia and bipolar disorder. Researchers ranked how related a crime was
to mental illness based on the perpetrator’s state of mind at the time. Up to 18 percent
of crimes were “mostly related,” meaning symptoms like suicidal thoughts or hallucination contributed
in some way to the cause of the crime but were not the sole motive. (Via U.S. Department
of Health and Human Services, YouTube / DepressionOutreach) The researchers found that two-thirds of the
subjects committed crimes based instead on motives related to poverty, unemployment,
homelessness and substance abuse — not mental illness.

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