A broken down car leads to one of the most agonizing US murder cases ever.

A leafy suburb erupts in a hail of gunfire that leaves one couple dead.

A young mother's tragic murder reveals a twisted web of lies and deceit.

A teen girl vanishes, and her mother believes she is a victim of foul play.

A tragic find along a riverbank seems connected to a witness at the scene.

A vibrant 13-year-old walks her dog right into the middle of a nightmare.

A 12-year-old girl storms out of her house following a fight and vanishes.

It takes only three minutes for a lifeguard's future to be forever changed.

For Crystal, Hurricane Harvey wasn't the worst tragedy of August 2017.

A woman's joyous solo vacation ends with a deadly betrayal.

Both a mom and her stepdaughter mysteriously vanish - but only one returns.

A little girl's raincoat spurs the start of an agonizing murder mystery.

A parked car with all four doors open foreshadows a horrifying murder case.

A teen's snowy walk ends with murder, and a four-decade search for justice.

A missing family car may hold the clues to find a devoted father's killer.

An unidentified child's murder leads a NY town to claim her as "Cali-Doe."