Dateline

On Nantucket Island, Mass., a couple's connection is instantaneous, but their summer romance takes a tragic turn; it seems like an open-and-shut case, but there's a surprise in store.

When a man claims to have found his wife dead in the bathtub, the woman's daughters suspect there may be more to the story.

31-year-old Matthew Podolak was a healthy, happy amatuer hockey player, a fisherman, and a family man… a mysterious illness sends him to the emergency room, and with his life in the balance, his family hopes for answers.

A young couple moves to California’s goldrush country, looking for new opportunities. But what they find is a life-altering tragedy.

A random post on a social networking site changes everything about a case that put two brothers in prison for more that two decades.

Early one frigid morning, in a small rural New York town, a house burns to the ground, and a woman is found dead in the debris. It's called an accident, but is it?

Kay Mortensen took pride in preparing for every threat, so when he was found dead at home, those who knew him were stunned. The killing put two of Kay's loved ones behind bars and in danger.

Jodi Arias and Travis Alexander had chemistry right from the start. Then he was killed, and she was arrested. The trial riveted millions, exposing Jodi’s secrets. Yet, it did not solve one mystery: exactly who was this woman behind the veil of lies?

Keith Bryan was a beloved fire chief, a pillar of his community. Then he was shot in his home, leaving police to wonder who would want to hurt the local hero? Turns out, someone was living a secret life, and it was about to be exposed.

Nona Dirksmeyer was a young beauty queen with a boyfriend she adored. They were planning a future together. Then, Nona was brutally killed. The crime shook her hometown and exposed someone with a secret past. But did the evidence add up to murder?

It's Friday the 13th and something sinister is about to happen: a chilling double murder in an upscale home; the evidence seems to tell a clear story until investigators discover a marriage filled with secrets and a story that doesn't add up.

A quiet night is shattered when intruders terrorize a Florida couple and their young son, killing one of them; investigators question the initial story; a tip leads them to another family with dark secrets, and that's when bonds are tested.

They were two beautiful families living out their dreams, but gunshots in a parking lot revealed an ugly truth. Investigators uncovered three lives tangled in a love triangle. There were many secrets, but which one was the key to solving the mystery?

Deede Keller has a loving family, a tight circle of friends and a new man in her life; when she vanishes, disturbing clues point investigators to a suspect with a dark secret; the case provides a twist that leaves the courtroom astonished.

When a woman is found dead in her home, it is ruled a suicide. But when a new investigation begins, police question if this is a case of murder.

Diana Lovejoy and her husband welcomed a baby boy, but then, their marriage crumbled. A bitter custody battle followed. Fearing for her safety, Diane turned to a man skilled in self-defense but, it turns out, someone else was in grave danger.

When a father goes missing and his body is found in a field several miles away, the investigation reveals multiple suspects -- including members of his own family.

The parents of missing South Carolina woman Heather Elvis, Debbi and Terry Elvis, open up to NBC News’ Andrea Canning about the search for their daughter.

When a young woman fails to show up to work and her mother rushes to her home to try to find her, what she discovers begins an investigation that leads to a suspect no one imagined.

Looking back at O.J. Simpson's infamous Bronco car chase and subsequent standoff with the LAPD SWAT team, 25 years after the murders of Nicole Brown Simpson and Ron Goldman.

When two tragic deaths occur within one week of each other in a wealthy city in California, families begin to wonder what happened inside a beachfront mansion.

A soon-to-be bride is caught in the middle of a twisted murder plot that has detectives questioning if she played a role in it.

A young woman's murder remains unsolved until someone comes forward to reveal her own harrowing story.

A young woman's murder remains unsolved until someone comes forward to reveal her own harrowing story.

Bill and Shirley Carter lived the simple life on their farm in rural Iowa. But one June morning, a violent encounter on that very farm would tear their family apart.

A soldier, just back from Afghanistan, is gunned down on the side of the road in Kentucky. Detectives quickly uncover a secret that could solve the case. Andrea Canning reports.

When a young woman finds out that her boyfriend might have shot and killed a college football player out of revenge, she struggles with coming forward to officials, fearing she could lose her life.

Rapper Meek Mill interview; exploring controversies surrounding the criminal justice system, including the parole system, wrongful convictions, challenges faced by law enforcement, alleged police abuse and more.

"Anatomy of a Capture" offers an in depth description of the capture of Saddam Hussein. "Richard Engel" talks about reaction from Tikrit, Iraq. "Judgement Day" examines how Saddam Hussein will likely face trial for war crimes. "Condoleezza Rice" talks to the National Security Adviser about the capture. "A Soldier's Story" talks to a former Gulf War prisoner of war about his reaction to the capture. "Still Missing" looks at the on going hunt for weapons of mass destruction in Iraq. "Raghida Dergham" discuss reaction to the capture in the Arab world. "The Ace of Spades" looks at worldwide reaction to the capture.

Former DEA agent Andrew Hogan details his search for Mexican drug lord Joaquín "El Chapo" Guzmán with never-before-seen videos and photographs.

The friends of a a Georgia father accused of murdering his ex-wife come together to prove he is innocent, while prosecutors count on his young children to testify against him.

A teenager is convicted of encouraging her boyfriend to kill himself; exclusive interviews with those on both sides of the case.

Tex and Diane McIver were an Atlanta power couple. She was a successful business woman. He was a lawyer with big political ties. One night and one turn changed their lives forever.

Joan Bradford, a beloved wife and mother is executed in her own home in suburban Los Angeles. It looks targeted, but who could want her dead?

When a young Army medic based at Ft. Bragg, N.C., goes missing, police can't solve the case despite having a suspect until an unorthodox private investigator steps in to help.

The tight, close-knit community of Kauai, Hawaii is a blend of tropical paradise and small town America. But the murder of Sandra Galas, a young, beautiful, mother has locals wondering who among them is a killer.

A Halloween turns tragic when a fiancée is killed at a bar. The investigation proves difficult when it's discovered all suspects were in costume.

When well-liked school superintendent Keith Reed fails to show up at a conference, family and colleagues descend on his house. Alarm bells start to ring when they discover most of the superintendent’s personal things – all but his cell phone -- are there.