Jeffrey Dahmer started killing in 1978, just 18 years old, and wasn’t arrested for murder until 1991, after a would-be victim escaped and led police back to Dahmer’s Milwaukee, Wisconsin, home. It was there that some of the gruesome details of his life of killing were seen via photos of mutilated bodies and body parts strewn across the apartment. He even had a vat of acid he used to dispose of victims. In all, Dahmer killed 17 people, mostly young men of color. He served time in prison twice—the first time for molestation and the second time for murder—and was killed by a fellow inmate in 1994.