Jeffrey Dahmer
Jeffrey Dahmer, known as the "Milwaukee Cannibal," murdered and dismembered 17 young men and boys between 1978 and 1991 in Wisconsin and Ohio. His crimes included necrophilia and cannibalism, and he was convicted of 15 murders in 1992 before being killed in prison in 1994.
Case overview
Jeffrey Lionel Dahmer, known as the Milwaukee Monster or the Milwaukee Cannibal, was an American serial killer who murdered 17 men and boys between 1978 and 1991. His crimes involved necrophilia, cannibalism, and the preservation of body parts, making him one of the most notorious criminals in American history. [AP News](https://apnews.com/article/jeffrey-dahmer-milwaukee-serial-killer-arrest-1991)
Dahmer was born on May 21, 1960, in Milwaukee, Wisconsin. His first murder occurred on June 18, 1978, when he killed hitchhiker Steven Hicks after his parents' divorce left him alone. He did not kill again until 1987, when he murdered Steven Tuomi in a hotel room in Milwaukee. Between 1988 and 1991, his killings accelerated dramatically.
Most of Dahmer's murders occurred at his apartment at 924 North 25th Street in Milwaukee. He would lure victims — predominantly gay Black men — to his apartment, drug them, strangle them, and then engage in necrophilia. He preserved skulls and body parts as trophies and experimented with cannibalism. [Washington Post](https://www.washingtonpost.com/history/2022/09/21/jeffrey-dahmer-netflix-series-facts/)
In May 1991, 14-year-old Konerak Sinthasomphone escaped Dahmer's apartment partially sedated. When police arrived, Dahmer convinced officers that Sinthasomphone was his adult boyfriend, and police left the boy with Dahmer, who subsequently killed him. Two Milwaukee police officers would later be disciplined for this failure.
Dahmer was caught on July 22, 1991, when Tracy Edwards, his intended 13th victim, escaped with a handcuff dangling from his wrist and flagged down Milwaukee police. Officers returned to Dahmer's apartment, where they discovered polaroid photos of dismembered bodies, a severed head in the refrigerator, and evidence of his crimes. Dahmer was arrested immediately. [BBC](https://www.bbc.com/news/world-us-canada-58719591)
The discovery shocked Milwaukee and the nation. Police found four severed heads, seven skulls, various preserved organs, and other body parts in Dahmer's apartment. He confessed readily and cooperated extensively with investigators.
Dahmer was charged on July 25, 1991, with four counts of first-degree intentional homicide. As investigators identified more victims, the charges grew to 15 counts. His trial began on January 13, 1992, in Milwaukee County Circuit Court. [AP News](https://apnews.com/article/jeffrey-dahmer-milwaukee-serial-killer-arrest-1991)
Dahmer's defense team pursued a plea of guilty but insane, arguing he suffered from a paraphilia that made him unable to conform his conduct to the law. Prosecutors countered that Dahmer's methodical behavior — drugging victims, disposing of evidence, maintaining a job — demonstrated sanity. On January 13, 1992, Dahmer entered pleas of guilty but insane to all 15 counts of murder.
After a two-week trial focused solely on his mental state, the jury on February 15, 1992, rejected the insanity defense by a vote of 10-2. Judge Laurence Gram sentenced Dahmer on February 17, 1992, to 15 consecutive life terms — 957 years in prison — with no possibility of parole. [CNN](https://www.cnn.com/2012/01/04/us/dahmer-sentenced/index.html)
Dahmer was transferred to the Columbia Correctional Institution in Portage, Wisconsin. On November 28, 1994, fellow inmate Christopher Scarver beat Dahmer to death with a metal bar while both were on a work detail. Scarver also killed another inmate, Jesse Anderson, in the same attack. [The Guardian](https://www.theguardian.com/world/1994/nov/28/usa.crime)
The case prompted significant scrutiny of the Milwaukee Police Department's handling of prior encounters with Dahmer, particularly the 1991 incident involving Konerak Sinthasomphone. Two officers were later disciplined for their failure to investigate properly.
November 28, 1994
Dahmer killed in prison
Jeffrey Dahmer was beaten to death by fellow inmate Christopher Scarver at Columbia Correctional Institution in Portage, Wisconsin.
Source →February 17, 1992
Sentenced to 15 consecutive life terms
Judge Laurence Gram sentenced Dahmer to fifteen consecutive life sentences for the Wisconsin murders.
Source →February 15, 1992
Jury rejects insanity defense
A Milwaukee jury rejected Dahmer's insanity plea after deliberating for about five hours, finding him sane and legally responsible for his crimes.
Source →January 13, 1992
Dahmer pleads guilty but insane to 15 counts
At a preliminary hearing, Dahmer pleaded guilty but insane to 15 counts of murder in Wisconsin.
Source →July 25, 1991
Charged with four counts of first-degree murder
Dahmer was charged with four counts of first-degree intentional homicide. Over subsequent weeks charges expanded to cover eleven Wisconsin murders.
Source →July 22, 1991
Jeffrey Dahmer arrested
Dahmer was arrested after his would-be victim Tracy Edwards escaped and flagged down Milwaukee police officers, leading them to Dahmer's apartment where they discovered photographs of dismembered bodies and a human head in the refrigerator.
Source →Relationship data not yet mapped — nodes positioned by force simulation.
Jeffrey Dahmer
Jeffrey Lionel Dahmer was an American serial killer and cannibal who murdered 17 young men and boys between 1978 and 1991. Convicted of 15 murders in 1992, he was killed by a fellow inmate at Columbia Correctional Institution in 1994.
Konerak Sinthasomphone
Konerak Sinthasomphone, 14, escaped Dahmer's apartment in May 1991, only to be returned to him by Milwaukee police officers who believed Dahmer's false story. He was subsequently murdered, and the police response drew widespread condemnation.
Tracy Edwards
Tracy Edwards was the man who escaped from Jeffrey Dahmer's apartment on July 22, 1991, with handcuffs still on his wrist, and flagged down Milwaukee police officers — directly leading to Dahmer's arrest and the discovery of his crimes.