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

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

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 ...

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

Investigators discover Bill and Nancy Mueller's trailer and Jeep abandoned in rural Arkansas, with no sign of the family to be found.

When a convicted felon is found to be in possession of Bill Mueller's gun, he shares a description of the people he purchased it from.

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

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

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

Bill Mueller meets a single mother, Nancy, and they quickly form a seemingly perfect relationship.

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