John Wayne Gacy was one of the worst serial killers in U.S history, he raped, tortured and murdered at least 33 young males over a 20 year period. Gacy is often referred to as the Killer Clown, due to his alter ego he took on when he performed at children's hospitals. In this episode of Murderous Minds, we look at the life of John Wayne Gacy, from his abusive childhood to his heinous crimes. (thetvdb.com)