The clown fear was introduced John Wayne Gacy. Gacy raped, tortured and killed 33 young boys. Gacy is known as moniker, which mean killer clown. 26 of Gacy’s victims were buried in the crawl space of his home. He put to death by lethal injection in 1994 despite saying that clowns can get away with murder. He was known as most creepy clown of all the time.