Crimes of Passion

The Hostetters and the Knepps were very close — but those close friendships ended when Carol Knepp was shot to death.

Candie Zito had dated Anthony Gibson when he was still in high school, even though she was 10 years older than him. Years after their breakup, she came back into his life in a shocking way.

Stephanie Dalympre ended her relationship with Dawn Houck after she learned she was pregnant. Houck seemingly couldn't handle the rejection.

Nicolas Morelos made his share of enemies on the job and in his romantic life —  but just who pulled the trigger as the former Marine was getting ready to settle down and get married? 

The three-part "Dateline" special about the accused "Black Widower" is airing on Oxygen this August.

Brenda Delgado couldn't move on after a breakup. She resorted to murder.

Cherryle Dell was suspected of masterminding her estranged husband's death, but when tragedy struck twice, a small town was left reeling with a killer in their midst.

Clara Rector and Tommy Hope started up a relationship built on drug use. It all came to a bloody end one night in 2004.

Bill Edmondson was beaten so severely there was a cowboy boot print visible on his chest.

Tommy Brown was brutally beaten to death with a toilet lid.