John Wayne Gacy is one of the worst serial killers in American history, murdering at least 33 teenage boys and men in the late 1970s. He was executed by lethal injection in 1994, but many are confident he killed even more victims than the ones he admitted to, and took plenty more secrets to the grave. THE END BITS Subscribe to Mamamia Want to try our new exercise app? Click here to start a seven-day free trial of MOVE by Mamamia. CREDITS Guest: Karen Conti. You can find out more about her book Killing Time With John Gacy here. Host: Gemma Bath Executive Producer: Gia Moylan Audio Producer: Scott Stronach GET IN TOUCH: Feedback? We’re listening! Email us at [email protected]   Tell us what you really think so we can give you more of what you really want. Fill out this survey and you’ll go in the running to win one of five $100 gift vouchers. If any of the contents in this episode have caused distress, know that there is help available via Lifeline on 13 11 14 or Beyond Blue on 1300 22 4636 Mamamia acknowledges the Traditional Owners of the Land we have recorded this podcast on, the Gadigal people of the Eora Nation. We pay our respects to their Elders past and present and extend that respect to all Aboriginal and Torres Strait Islander cultures. Become a Mamamia subscriber: https://www.mamamia.com.au/subscribe See omnystudio.com/listener for privacy information.