Season 12

Cases Profiled: James Johnson, Zodiac serial killer, Douglas Berry, Gregory Brown, Roy McColl, Andrea Baird, Michelle Delfi-Feliciano, Christina Williams

This episode features: John Addis, Michel Barrera, Stephanie Condon, David and Martha Crowe, Jonathon Goforth, Anna Palmer Murder Witness, Jose Silva, Eric Stein and Barry Zeltner.

This episode features: Amy Bradley, Michael Cleary, Carlos Chacon, Bernardo Martinaj, Ephraim Mistica, Rodrigo Leones, Dennis Rabbitt, Unknown Rodeo Molester, Robert Owens III, and Rosa Suarez

This episode features: Amber Creek Killer, James Kinney, Jeffrey Durham, and Donald Eary.

This episode features: Janette Piro Killer, Christopher Benedetto, James Kopp, Rachel Newhouse, Carlton Edwards, John Feiga, Orange Socks Jane Doe, Stephen Toussaint, Jimmy Turner, Michael Reese, Elrick Wynn

This episode features: Teresa Dickson's Killer(s, Jamie Edwards, Alvaro Ochoa, Mario Pallanga, Robert Jackson, Leah Rowlands' Killer and Shannon Schiber's Killer.

Cases Profiled: Shad Armstrong, Charles Brackett, Brown's Chicken killers, Linda Crouch, Roger Crouch, Alan Golder, Eugene Linder, Russette Medina, Melvin Menendez, Israel Rivera-Sanchez, David Schullman killer, Juan Reyes, Kenneth Armstrong, Mikelle Biggs, Travis Crouch