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

Find out why Joseph O’Boyle brutally killed his doctor, beloved chiropractor James Sowa, in his Bensalem, Pennsylvania, home, and how detectives found him.

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

Investigators and loved ones speak out on Ezra McCandless's violent nature.

Preview: It is quickly discovered that Carmela Knight died from blunt-force trauma before being badly burned in a house fire.

What happened to the Memphis businessman?

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

After Uloma Curry-Walker's frantic 911 call, firefighters on the scene recognize Lt. William Walker, a fellow firefighter.

Dr. Jim Sowa is killed by his patient, Joey O'Boyle, who had a history of violence and mental health struggles.

Investigators find a partially packed suitcase in Joey O'Boyle's home.

Learn more about Patricia McDermott's fatal shooting in Philadelphia, and what police later found out about her killer Juan ...

Preview: Carmela Knight, a "suburban hockey mom", was found dead after a house fire surrounded by drug paraphernalia. What happened?