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

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

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

Friends and family tearfully recall the night that led to Carmela Knight's death.

Alex Sowa, Jim Sowa's son, tearfully recalls finding his father's body.

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Learn more about murder victim Scott Sessions and the shocking circumstances that followed when authorities tracked suspects Heather Frank and Kevin Eastman.

Learn more about how medical examiners determine the manner of death ahead of the Season 5 return of Oxygen's Accident, ...

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

Lt. William Walker's fellow firefighters speak out about his tragic death and how they dealt with the aftermath of his ...

Learn more about the new three-part Oxygen special Lady of the Dunes: Hunting the Cape Cod Killer, premiering Friday, ...

Learn more about how authorities tied Bradford King to the murder of his wife, Michigan anchorwoman Diane King.