Dateline Extra on MSNBC

After a young Army veteran disappears, detectives uncover a cryptic 911 call placed 11 days before she went missing, which exposes a twisted story -- and the truth.

After shedding hundreds of pounds, a popular kindergarten teacher goes missing; investigators find a link between her weight loss and her disappearance.

A foreign exchange student and soccer player's participation in a dangerous game leads to deadly consequences.

When detectives track down the killer of a Las Vegas cocktail waitress and mother, it becomes clear that the investigation has just begun.

A model with a checkered past goes under cover to reveal the truth about a cold case involving a romantic getaway on a boat that ended with a woman being lost at sea.

As detectives struggle to find leads in the murder of a college student, the perpetrator strikes again.

Robert Davis, who was convicted of murdering a woman and her son, claims his confession was coerced and tries to prove his innocence.

An investigation into the murder of a beloved couple in South Carolina reveals a feud and divides a family.

When a Chicago woman from a big family goes missing, investigators begin to suspect a man in her life is full of secrets.

After a woman reports a prowler, police find her Olympic bronze medalist husband dead in their backyard.

When remains are found amid the rubble after a house fire, authorities soon discover the incident was no accident.

After a sudden marriage creates tension between two families, a murder exposes secrets, lies and a long-buried mystery.

Dark secrets come to light as officials investigate what happened to a wife and mother of three who was found dead in her bathtub.

A community is left in shock when a Cornell student and star athlete gets caught in the middle of a homicide investigation.

The security cameras at the home of a wife and mother of three's home may hold the key to solving the mystery of her disappearance.

The thousands of passengers who boarded the Costa Concordia for a seven-day tour of the Mediterranean expected a first-class, five star sail to exotic locales; but quickly, they'd be locked in a life-or-death struggle, to escape.

The thousands of passengers who boarded the Costa Concordia for a seven-day tour of the Mediterranean expected a first-class, five star sail to exotic locales; but quickly, they'd be locked in a life-or-death struggle, to escape.

Richard Engel investigates the poisoning death of former Russian agent and businessman Alexander Litvinenko; Engel travels to London, Moscow and Rome to take a deeper look into Litvinenko's death, the investigation and those involved in the case.

A relationship turns into something deadly.

A young girl abducted and raised by her kidnapper spends decades trying to find her way home, searching for her family, her name, and the truth about herself.

An army major is attacked in his bed in the middle of the night; police uncover secrets that might hold the key to his murder.

A puzzling case of a missing mother in a suburban neighborhood believed to be safe; when they investigate, police find a dark side behind the bright facade.

A fatal car crash leaves two dead and one seriously injured; it may have not been an accident.