Jeffrey Lionel Dahmer - Milwaukee, USA

Jeffrey Lionel Dahmer (May 21, 1960 Ð November 28, 1994) was an American serial killer, who murdered 17 men between 1978 and 1991 (with the majority of the murders occurring between 1989 and 1991). His murders were particularly gruesome, involving rape, necrophilia and cannibalism. With evidence overwhelmingly against him, Dahmer pleaded not guilty by reason of insanity. The court found Dahmer sane and guilty on 15 counts of murder and sentenced him to 15 life terms, totalling 957 years in prison. On November 28, 1994, Dahmer and another inmate were beaten to death by fellow inmate Christopher Scarver with a bar from a weight machine while on work detail in the prison gym. Dahmer died from severe head trauma in the ambulance while en route to the hospital. (Photo by PA/PA Images via Getty Images)