Straight from the killer's mouth.
The chilling story of one of the world’s most notorious serial killers told through the words of Gacy himself, those who were forever changed by his unspeakable deeds and those who believe that the full truth remains concealed to this day.
Terry Sullivan
Self - Fmr. Prosecutor, Cook County, IL
6 eps
Jay Levine
Self - Ret. News Anchor & Chief Correspondent
5 eps
Rafael Tovar
Self - Ret. Des Plaines Police Detective
Lawrence Finder
2022
2018
Karen Kuzma
Self - John Gacy's Sister
Craig Bowley
Self - John Gacy Prison Correspondent
4 eps
David Hachmeister
Self - Ret. Des Plaines Police Officer
Michael Albrecht
William Kunkle
Self - Fmr. Chief Prosecutor, Cook County, IL
Ray Cornell
Self - John Gacy's Former Friend
3 eps
Patti Szyc-Rich
Self - John Szyc's Sister
Eugenia Godzik
Self - Gregory Godzik's Sister
Anthony Antonucci
Self - Former Gacy Employee
2 eps
David Dutton
Self - Fmr. Prosecutor, Black Hawk County, IA
Jim Szyc
Self - John Szyc's Brother
2026
2025
2020
2021
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