When a family of four, including two young children, vanish in California, police think they left voluntarily; it takes a decade for the awful truth to emerge: a killer, hiding in plain sight, slaughtered an entire family.

When a soldier is gunned down on a dusty street in a California desert town, the investigation tests the bonds of friendship and the limits of family loyalty as police close in.

When an outspoken radio personality and veterans' advocate is gunned down in her own bedroom, investigators try to figure out why.

A popular chiropractor is healthy one day then dies a painful death the next, so police begin the search for a murderer.

The body of insurance salesman Brian Davis is found alongside a bayou in Calcasieu Parish, La.; police discover that Davis had many secrets, and those closest to him may be involved in the death.

A Naval officer who rose through the ranks and once questioned terrorists at Guantanamo Bay is found by his wife, dead inside a Florida hotel room.

A wife claims she woke up to discover her husband had been shot to death as she slept next to him; police question if she is a shocked and grieving widow or if she's a cunning killer with a twisted master plan.

When a North Carolina preacher's wife is found murdered, police must determine not only who may have wanted her dead, but whether some members of the congregation are mourning -- or trying to cover up their part in the violent crime.

Family members desperately search for a missing Virginia teenager, not knowing police have a secret: they've discovered his body but refuse to release any info as they untangle an extraordinary motive.

Police search for an odd-looking gunman who was seen fleeing after shooting a young mom to death; the police uncover a suspect who has a motive that's impossible to comprehend.