The 10 hardest serial killers of all time

John Wayne Gacy

John Wayne Gacy was put to death with a shot of lethal injection after spending 14 years on death row. He took the lives of 33 young boys and men. The grotesque serial killer lived in Chicago where he committed all the murders inside his house. He would bring men around to his house and kill them either by strangulation or asphyxiation. Gacy buried 26 of his victims in his crawlspace and three in another part of his property and the rest were cast into the river. The killer was often seen in charity events, parades, and children’s parties.