John Wayne Gacy : Autoportrait d'un tueur

Terry Sullivan

Self - Fmr. Prosecutor, Cook County, IL

John Wayne Gacy

Archive footage

Craig Bowley

Self - John Gacy Prison Correspondent

Jay Levine

Self - Ret. News Anchor & Chief Correspondent

Joseph Kozenczak

Self - Fmr. Des Plaines Police Chief

David Hachmeister

Self - Ret. Des Plaines Police Officer

Anthony Antonucci

Self - Former Gacy Employee

Rafael Tovar

Self - Ret. Des Plaines Police Detective

Lawrence Finder

Self - Fmr. Prosecutor, Cook County, IL

Michael Albrecht

Self - Ret. Des Plaines Police Officer

Karen Kuzma

Self - John Gacy's Sister

David Dutton

Self - Fmr. Prosecutor, Black Hawk County, IA

William Kunkle

Self - Fmr. Chief Prosecutor, Cook County, IL

Ray Cornell

Self - John Gacy's Former Friend

Marty Zielinski

Self - Photographer

Carole Lofgren

Self (archive footage) (voice)

Patti Szyc-Rich

Self - John Szyc's Sister

Jim Szyc

Self - John Szyc's Brother