An investigation into the poisoning of Wisconsin mother Julie Jensen takes a surprising turn when detectives learn that she wrote a letter days before her death pointing to a possible suspect.

Find out the fate of Monica Sementilli, who was convicted of murdering her hairdresser husband, Fabio, in 2017.

Authorities considered the possibility that Roy had just wanted to disappear, but the Tennessee Bureau of Investigation ...

Unknown Serial Killer of America unpacks the investigation leading to prolific Indiana killer Herb Baumeister, believed to ...

Find out why Nick Firkus fatally shot wife Heidi Firkus in their St. Paul, Minnesota, home, what he was hiding, and how he ...

When an 11-year-old boy finds his mother brutally slain in their suburban Atlanta condo, detectives begin a desperate search to find the woman’s killer, only to discover that this murder is the work ...

Watch Kill or Be Killed on Oxygen Saturdays at 9/8c. Catch up on the Oxygen app. Alone with her three children — sons Bert, 11, and Noah, 3, and 2-year-old-daughter Mason — Tracey told authorities she ...