Who the characters are based off:
Ben Gunness: Belle Gunness, Confirmed murders: 14, Suspected total murders: 40+
Jenny Dahmer: Jeffrey Dahmer, Number of victims: 17
Andria Chikatilo: Andrei Chikatilo, Confirmed murders: 52, Suspected total murders: 56+
Teddy Bundy: Ted Bundy, Confirmed murders: 20, Suspected total murders: 36+
Edwina Gein: Ed Gein, Confirmed murders: 2, Suspected total murders: 9
Harmony Shipman: Harold Shipman, Confirmed murders: 284