Tracy Ullman is a documentary producer, director, and writer living in Chicago. She has produced dozens of non-fiction television programs for Discovery Networks, Oxygen, AETN Networks, and PBS. Her most recent production is a six-part limited documentary series about serial murderer John Wayne Gacy and the new discoveries made in his case for NBC's Peacock streaming service.

Dr. Katherine Ramsland is a professor of forensic psychology, a published author, a trainer for law enforcement, an international speaker, and an expert on extreme criminal psychology. She has consulted for multiple media outlets, been an executive producer, and is a frequent guest on podcasts and crime-centered programs.