John Wayne Gacy 1999 Documentary

John Wayne Gacy, Jr. (March 17, 1942 – May 10, 1994) was an American serial killer and rapist who sexually assaulted and murdered at least 33 teenage boys and young men between 1972 and 1978. Gacy buried 26 of his victims in the crawl space of his home, buried three others elsewhere on his property, and discarded the remains of his last four known victims in a nearby river. He was convicted of 33 murders and sentenced to death for 12 of these killings. He was executed in May 1994.

Gacy later became known as the "Killer Clown" due to his charitable services at fund raising events, parades and children's parties where he would dress as "Pogo the Clown", a character he devised himself.

@Wiki