For the first time, eight mothers who lost their daughters at Camp Mystic during the catastrophic floods in Texas nearly a year ago open up about their grief, their bond, and their investigation into what happened.

After mom Regina Hicks is found dead in her car submerged in a pond, the case goes unsolved for nearly 25 years; in a Dateline exclusive, the man who helped police capture the killer speaks out and reveals what happened that night.

A mystery in paradise unfolds when Sarm Heslop vanishes from her boyfriend's luxury yacht in the U.S. Virgin Islands; new details emerge on the case that made international headlines and left investigators with more questions than answers.

When 18-year-old Anjelica "AJ" Hadsell disappears, the investigation into her inner circle reveals a sinister betrayal; featuring interviews with AJ's stepfather Wesley Hadsell and two of her friends.

The disappearance of a loving Kentucky mom leads police to question the three men closest to her; for the first time the lead investigator speaks out about the case.

A young, successful businesswoman moves from South Florida to Madrid for a fresh start then goes missing a few months after relocating; as her friends search for answers, authorities investigate and begin examining her relationships.

When a wife calls 911 to report her husband has been shot on a country road in Texas, officers rush to the scene.

A woman goes missing and investigators uncover her husband's chilling history including dark secrets about another missing wife.

Rod Covlin, a New York man found guilty of murdering his wife for her $5.3 million fortune.

When a fire erupts at a New Jersey mansion, authorities find four family members dead; after detectives uncover a second fire nearby, they discover a shocking connection between the blazes, exposing a web of deception within the family.

When a young mother disappears after leaving her infant in the care of her local pastor and his wife, Florida detectives search for her for five years, uncovering a web of secrets and lies.

Exclusive new details and insight into the Luigi Mangione investigation; insiders speak out for the first time about the murder of the UnitedHealthcare CEO.

A beloved Staten Island teacher is found dead in the home she shared with her husband; an unknown number in her cell phone leads investigators to reveal troubles in her seemingly idyllic life -- and to ultimately unearth her killer.

A middle school art teacher is shot to death in the home she shared with her husband; new evidence and testimonies poke holes in the story of a harmonious three-way affair between the couple and a mutual friend.

Compelling mysteries, powerful documentaries, in-depth investigations.

When a mom is murdered in her driveway, detectives look to the warehouse where she works for answers; the convicted murderer speaks out for the first time.

A mother in Pennsylvania disappears after co-workers see her leaving for lunch.

Detectives in Washington D.C. discover a puzzling connection between two women who disappeared two decades apart; an investigation reveals a sinister secret hidden along one of the busiest stretches of interstate in the country.

The latest in the Alex Murdaugh case after his double murder convictions were overturned, and a new trial was ordered for the murders of his wife and son; key insiders speak out in new interviews about the developments.

When 19-year-old Anton Black dies while being taken into police custody, the community seeks justice; a yearlong "Dateline" investigation looks at the officer at the center of the case and missed warning signs.