When a father of four vanishes, a body transporter and coroner become key witnesses in a new episode of "20/20" airing on ...

When a South Carolina father vanished, police had no idea it would lead to the discovery of a shocking affair, a body found ...

A Colorado mother's stalking nightmare ended in murder when police discovered her husband had posed as her ex-boyfriend, sending threats before killing her at home.

Denise Amber Lee was kidnapped and murdered in 2008, and the 911 calls associated with her disappearance sparked nationwide reforms.