Dateline NBC

A man convicted of murdering a woman in her upscale Austin, Texas, home tells his story for the first time.

A Jacksonville, Fla., firefighter discovers a disturbingly violent scene in his darkened bedroom on a Halloween weekend.

Police initially suspect natural causes as they investigate a man's death, until they learn about an unconventional love triangle, which points the investigation in a new direction.

The investigation into the disappearance of a Marine's 19-year-old wife reveals a secret love triangle and multiple suspects.

A man's children stand by him as he deals with courts in upstate New York; a woman accused of attempting to hire a hit man to kill her husband.

A tight-knit Long Island family go to extraordinary lengths to find their missing sister.

Michael Peterson, who was granted a new trial after the 2003 conviction in the murder of his wife was overturned, discusses the case and his decision to enter an Alford plea.

A look at the 2004 murder of pregnant California woman Laci Peterson, including previously unseen interrogation footage of her husband, Scott, who was convicted of the crime.

A look back at the 1997 murder of fashion designer Gianni Versace, including interviews with his long-time partner Antonio D'Amico, model Beverly Johnson, fashion journalist Hal Rubenstein, author Maureen Orth and more.

The battle between a wife and a mistress for one man's heart leads to a deadly car chase.

An in-depth interview with Charles Manson's former parole officer; rarely seen video of Manson; interviews with victims' family members, and others close to the case.

When film executive Gavin Smith vanishes, Los Angeles detectives search for clues amid reported sightings and suspicious circumstances.

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.