Michael ChernusJohn Wayne Gacy

Gabriel LunaDet. Rafael Tovar

James Badge DaleChief of Detectives Joe Kozenczak

Michael AngaranoSam Amirante

Chris SullivanLead Prosecutor Bill Kunkle

Marin IrelandElizabeth Piest

Greg BrykHarold Piest

Cricket BrownKerry Piest

Ted DykstraDet. Allen Fanholm

Thom NyhuusKenneth Piest

Ryker BalounRob Piest

Patrick MacmanusCreator & Executive Producer

Noah OppenheimExecutive Producer

Ahmadu GarbaExecutive Producer

Kelly FunkeExecutive Producer

Ashley Michel HobanExecutive Producer

Liz ColeExecutive Producer