John Wayne Gacy

Also known as the Killer Clown, this married father of one raped and killed 33 boys and men over a six-year period. Most of Gacy's victims were found buried in the ducts of his suburban Chicago home! He was finally discovered when investigators linked him to a teenager who had gone missing a few days earlier. 

Soon, all of Gacy's skeletons were uncovered and he was handed the death penalty in 1980. He was finally executed by lethal injection in 1994. 

-Picture courtesy hauntmastersclub.com-