Terry Sullivan

Self - Fmr. Prosecutor, Cook County, IL

John Wayne Gacy

Self - Serial Killer

Robert K. Ressler

Self - Ret. FBI Profiler

Philip Hersh

Audio Description Narrator

Jay Levine

Self - Ret. News Anchor & Chief Correspondent

Lawrence Finder

Self - Fmr. Prosecutor, Cook County, IL

David Cram

Self - Former Gacy Employee

John Szyc

Self - Victim of John Wayne Gacy

Michael Rossi

Self - Former Gacy Employee

Rafael Tovar

Self - Ret. Des Plaines Police Detective

Karen Kuzma

Self - John Gacy's Sister, Self - John Wayne Gacy's Sister

Craig Bowley

Self - John Gacy Prison Correspondent

William Kunkle

Self - Fmr. Chief Prosecutor, Cook County, IL

Dave Hachmeister

Self - Ret. Des Plaines Police Officer

Robert Piest

Self - Victim of John Wayne Gacy

William Kindred

Self - Victim of John Wayne Gacy

William Carroll

Self - Victim of John Wayne Gacy

Gregory Godzik

Self - Victim of John Wayne Gacy