In the end, Alex and Herring, as well as Herring's sister, Marion Kinley, and her brother-in-law, John Wayne Kinley, Jr., ...

Learn more about the most wanted murderers in the U.S. ahead of the Unknown Serial Killers of America premiere.

The series premiere of Unknown Serial Killers of America airs on Sunday, May 18, 2025, at 7/6c on Oxygen, following an all-new episode of Oxygen’s Snapped.