John Wayne Gacy, also known as "The Killer Clown," was a husband and father, but he was also a repeated sex offender who victimized countless people during his lifetime. He was caught sexually assaulting two teenage boys in 1968 and sentenced to 10 years in jail, but due to his exemplary behavior as an inmate he was released on parole after serving just 18 months.

Once he was released from jail, Gacy briefly remarried (they divorced when she discovered that he was secretly gay) and became a popular and jovial member of society. He enjoyed dressing up as "Pogo the Clown" and volunteering at children's parties, parades, and other community gatherings. He was a respected businessman and well-liked by his neighbors.

During the six years between the time he got out of jail and when he was finally arrested again for suspicion of kidnapping, Gacy murdered an astounding 33 young men. He buried most of the bodies in the crawl space of his house, in his yard, and later (when he started to run out of space), he dumped them in a nearby river. He would lure hitchhikers, male prostitutes, and other young men and boys into his car or his home, then torture, rape, and murder them.

After he was arrested and the police found the bones in his basement, Gacy issued a full confession and was executed in 1994.