History's Greatest Mysteries

Michael Butterfield (Self - Editor at ZodiacKillerFacts), Zodiac Killer (Self - Serial Killer), Keli Richards (Self - Associate Professor of Forensic Science at George Mason University), David Oranchak (Self - Cryptographer), Evy Poumpouras (Self - Forensic Psychologist), Robert Schug (Self - Associate Professor of Criminology at California State University Long Beach), John Tefft (Self - Retired Homicide Detective), Arthur Leigh Allen (Self - Suspect), Francesco Amicone (Self - Journalist), Cheri Jo Bates (Self - Murder Victim)