After Lt. William Walker succumbs to his injuries, investigators must find out who killed him and why.

A well-respected firefighter and loving family man is found gunned down outside his suburban home, sending police on a furious search for his killers. What they find stuns even the most hardened ...

Uloma Curry-Walker wanted her husband, William Walker, dead. Learn how she had him murdered right after they married.

Ezra McCandless tried to claim she stabbed her ex-boyfriend Alex Woodworth to death in self-defense. See what police decided happened.

Find out why James Henrikson had Doug Carlile fatally shot in his Washington state home, and how Henrickson was linked to ...

A young woman seeks refuge at the home of a Wisconsin farmer, claiming she just escaped from a violent assault. When ...

Learn more about the investigation into Michigan man Trent Mallory's 2014 murder, as told in Oxygen's Killer Relationship.

Charles Manson solidified his place in the public consciousness as a volatile, crazy-eyed cult leader who led his followers to commit some of the nation’s most heinous murders—but there was another, ...

What happened to the Memphis businessman?

Season 3 Preview: "Trader Trent's" following on Facebook Marketplace opened up a range of possibilities for detectives.

Detectives reveal the weather was vital in Trent Mallory’s case.

After Leon Harrison Jr. disappears, a missing persons investigation leads to disturbing clues and reveals a toxic relationship.