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."

A overlooked clue leads to justice decades after a young woman's murder.

Maria digs into the wrongful murder accusation of a teenage boy in 1990.

Squatters seek revenge on a Florida woman after she had them reported.

Maria investigates the false confession of a 14-year-old murder suspect.

A woman driving solo to visit a friend on Florida's I-95 vanishes.

A missing cheerleader and a roadside fire lead to an investigation.

In New Mexico, it's a race against time to stop a potential serial killer.