Dateline

Investigators search for a New Mexico mechanic who has been missing for eight years.

When a woman disappears after an encounter on a train, her family hires detectives to investigate.

A mother who seemed to be happily married is found dead in her backyard spa.

A professional poker player's gamble may have resulted in a murder.

Authorities investigate a car crash that left a pregnant woman and her son dead.

The mysterious 2005 disappearance of Ray Gricar, a district attorney in Pennsylvania.

Detectives reopen a case involving the murder of a man who was part of a love triangle.

Investigators find an unlikely suspect in a woman's death.

A woman seeks justice for her 18-year-old daughter, who was raped and murdered in an Anchorage state park in 1994.

Keith Morrison reports on a dramatic undercover operation in Palm Beach, Florida to save a wife and mother who had no idea she was in danger.

A man with a surprising motive shoots a father in broad daylight.

A woman finds herself on the wrong side of the law after she accuses her boyfriend of rape.

Investigating the connection between an attack and a woman's disappearance in nearby Denver.

Investigators are suspicious when a wealthy former radio DJ mysteriously disappears from his yacht in the Pacific Ocean.

Years after a college student is murdered in her condo, calls to the police lead to the case being reopened and solved.

Officials identify a man's remains more than 20 years after his mysterious disappearance.

A couple goes on a scuba-diving vacation in the British Virgin Islands. On the final dive of the trip, one of them surfaces but the other does not.

Investigating the mysterious murder of a family patriarch.

A cold-case investigator helps police determine what happened to a missing woman.

When Tom Foley becomes the top suspect in his wife's murder, he spends the next two years trying to prove his innocence.