Warning Signs

An examination of Gacy's past reveals unsettling evidence that authorities knew he was a sexual predator; still, Gacy was able to evade law enforcement for more than a decade as he committed his deadly crimes.

My Thoughts

Guest Stars

Special appearances in this episode.

Guest Stars

Craig Bowley

Self - John Gacy Prison Correspondent

Jay Levine

Self - Ret. News Anchor & Chief Correspondent

David Hachmeister

Self - Ret. Des Plaines Police Officer

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)

Crew

Episode-specific crew credits.

No crew data available.

Videos

Clips and promos for this episode.

Videos

No videos available.

Stills

Episode still images from TMDB.

Stills

Still

1080 × 608