John Wayne Gacy : Autoportrait d'un tueur

Terry Sullivan

Self - Fmr. Prosecutor, Cook County, IL

Jay Levine

Self - Ret. News Anchor & Chief Correspondent

Rafael Tovar

Self - Ret. Des Plaines Police Detective

Lawrence Finder

Self - Fmr. Prosecutor, Cook County, IL

Karen Kuzma

Self - John Gacy's Sister

Craig Bowley

Self - John Gacy Prison Correspondent

David Hachmeister

Self - Ret. Des Plaines Police Officer

Michael Albrecht

Self - Ret. Des Plaines Police Officer

William Kunkle

Self - Fmr. Chief Prosecutor, Cook County, IL

Ray Cornell

Self - John Gacy's Former Friend

Patti Szyc-Rich

Self - John Szyc's Sister

Eugenia Godzik

Self - Gregory Godzik's Sister

Anthony Antonucci

Self - Former Gacy Employee

David Dutton

Self - Fmr. Prosecutor, Black Hawk County, IA

Jim Szyc

Self - John Szyc's Brother

Ron Wilder

Self - Jeffrey Rignall's Partner

Karen Conti

Self - Gacy's Death Row Attorney

Larry Potash

Self - News Reporter & Anchor

Alison True

Self - Journalist

William Dorsch

Self - Ret. Chicago PD Homicide Detective

Joseph Kozenczak

Self - Fmr. Des Plaines Police Chief

Marty Zielinski

Self - Photographer

Carole Lofgren

Self (archive footage) (voice)

Sam Amirante

Self - Gacy's Attorney (archive footage)