

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.
Self - Fmr. Prosecutor, Cook County, IL

Archive footage

Self - Ret. News Anchor & Chief Correspondent
Self - Ret. Des Plaines Police Detective
Self - Fmr. Prosecutor, Cook County, IL

Self - John Gacy's Sister
Self - John Gacy Prison Correspondent
Self - Ret. Des Plaines Police Officer
Self - Ret. Des Plaines Police Officer
Self - Fmr. Chief Prosecutor, Cook County, IL
Self - John Gacy's Former Friend
Self - John Szyc's Sister
Self - Gregory Godzik's Sister

Self - Former Gacy Employee
Self - Fmr. Prosecutor, Black Hawk County, IA
Self - John Szyc's Brother
Self - Jeffrey Rignall's Partner

Self - Gacy's Death Row Attorney
Self - News Reporter & Anchor
Self - Journalist
Self - Ret. Chicago PD Homicide Detective
Self - Fmr. Des Plaines Police Chief
Self - Photographer
Self (archive footage) (voice)
Self - Gacy's Attorney (archive footage)
Self - Former Gacy Employee
Self - Former Gacy Neighbor
Self - Sheriff of Cook County
Self - Cook County Sheriff's Office
Self - Attorney
Self - Mother of Michael Marino (archive footage)

2022 • TV Show

2018 • TV Show

2022 • TV Show

2020 • TV Show

2026 • TV Show

2026 • TV Show

2026 • TV Show

2025 • TV Show

2022 • TV Show

2011 • TV Show