Actor Jack Merrill has revealed the horrifying details about how he was kidnapped and rapedby serial killer John Wayne Gacy in 1978. RadarOnline.com can reveal how the actor escaped the near-death experience with Gacy, also known as the Killer Clown, who brutally murdered 33 young men and boys. The famous serial killer raped, tortured, and strangled his male victims before disposing of their bodies beneath his house. Merrill, now 65, revealed that he was working at a club in Chicago and was walking home when Gacy, then 36, pulled over and offered the teen a ride. The actor told People: “He pul…