Billy and Dale

Michael Chernus

John Wayne Gacy

Gabriel Luna

Det. Rafael Tovar

James Badge Dale

Chief of Detectives Joe Kozenczak

Michael Angarano

Sam Amirante

Chris Sullivan

Lead Prosecutor Bill Kunkle

Marin Ireland

Elizabeth Piest

Greg Bryk

Harold Piest

Max Mattern

Billy Carroll

Mason Versaw

Robert Donnelly

Jake Horowitz

David Cram

Brayden Raqueño

Dale Landingin

Nina Kiri

Mary Amirante

Michael Esper

Bob Motta

Augustus Prew

Jeffrey

Ianne Fields Stewart

Sophia St. Laurent

Ish Morris

Guard Jenkins