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Find out why Mary Jane Fonder fatally shot fellow congregant Rhonda Smith in an office of their Pennsylvania church, and how "jealousy" played a role.

Find out how investigators determined Tony Vick was responsible for the deaths of wives Amy Vick and Kathy Beadle.

Find out why Crystal Mangum is coming clean about her role in the 2006 Duke lacrosse rape scandal and admitting she lied in controversial case.

Find out more about the new tour set to take tourists to the site of the 1978 Jonestown massacre in Guyana, and what survivors think.

Collier Landry speaks about a conversation he had just days after his mother disappeared.

Officers learn that Amy Vick had been in two major car crashes less than a week before her death. Latest Videos ...

Mollie Tibbetts, 20, went for an evening run and disappeared. What happened to her?

Mollie Tibbetts went on evening runs nearly every night, until one day she disappeared.

A search party of hundreds of people goes looking for Mollie Tibbetts.

A daughter speaks out about a life insurance policy that may have served as motive for her father to kill her mother.

Mary Jane Fonder, later charged with the death of Rhonda Smith, may also have been involved in the purposeful killing of her father and of a dog.