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The mystery surrounding the deaths of three women deep in the Sonoran desert takes 17 years to untangle.

The mystery surrounding the deaths of three women deep in the Sonoran desert takes 17 years to untangle.

Keith Morrison reports on an undercover operation in Palm Beach, Florida to save a wife and mother.

A couple goes on a scuba-diving vacation in the British Virgin Islands; one of them surfaces but the other does not.

In 2005, a district attorney in Pennsylvania went missing, seven years after he investigated sex-abuse allegations made against Jerry Sandusky.

The untold true story of NFL superstar Aaron Hernandez from the viewpoint of those who knew him best strips away the layers to answer the many questions left behind after Hernandez's tragic death.

The untold true story of NFL superstar Aaron Hernandez from the viewpoint of those who knew him best strips away the layers to answer the many questions left behind after Hernandez's tragic death.

A young couple becomes the target of a nationwide manhunt after police connect the deadly lovers to two grisly murders in different states.

A horrific killing spree leads Pennsylvania investigators on the hunt for two young lovers willing to do whatever it takes to evade the law.

The sudden disappearance of a wealthy couple rattles their small town and launches an investigation that exposes a web of deception, greed and a blood-soaked betrayal.

When a wealthy couple falls victim to a deadly home invasion, the search for the killers exposes both a twisted relationship and a family betrayal no one saw coming.

When a beloved grandmother falls victim to a brutal crime, the search for her killers reveals a torrid romance between two young lovers willing to do anything to get what they desire.

The unexplained disappearances of a young mother and her two sons in 1980 lead investigators on a three-decade quest for justice, exposing multiple murders and a homicidal love affair that left untold suffering and carnage in its wake.

A loving couple are found shot to death in their home, forcing police to pursue a pair of desperate lovers on a cross-country manhunt.

When a young woman is found tortured and killed after a camping trip with friends, police must unravel two couples' conflicting stories of depravity to bring her killers to justice.

The disappearance of a young socialite in Charleston prompts a team of private investigators to unearth a betrayal at the hands of her two best friends, one of whom is a con artist with a secret.

When a single mother is found murdered in her home, the investigation exposes a twisted love triangle and a murder-for-hire scheme devised to kill the competition.

The ritzy ski resort town of Aspen, Colo., is turned upside down when a celebrated socialite is found murdered in her home, leading investigators to uncover a bitter feud between friends.

The brutal murder of a young Army specialist leads investigators to explore a complicated love affair fueled by obsession and jealousy.

When a beloved schoolteacher is violently assaulted outside her home, police discover a toxic romance that destroyed a family's bond.