Dateline NBC

When a father's body is found in a field, the investigation reveals multiple suspects.

When film executive Gavin Smith vanishes, Los Angeles detectives search for clues.

A riveting new look at Manson: how the fame-crazed criminal convinced his "family" to kill.

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

A woman searches for answers after the investigation into her daughter's murder goes cold.

A man claims to have shot his wife after mistaking her for an intruder.

When Cara Ryan shoots her ex-husband and accuses him of threatening to kill her, police question her motive.

Surprising details from Amber Frey, the other woman in Scott's life, and rare police video of Scott.

A detective promises to get justice for a victim whose body turns up at a trash facility.

Michael Peterson discusses his decision to enter an Alford plea before his second murder trial.

The investigation into the disappearance of a mother of three in Colorado reveals she was living a double life.

Police investigate when a 23-year-old woman goes missing from a shopping mall in Plano, Texas.

Two double homicides committed five years apart lead police to suspect a serial killer is to blame.

Police investigate whether the murder of a South Florida attorney is connected to a web of fraud.

A relative and a friend of a man who forgot his son in a hot car for hours speak out about the case.

A woman accused of attempting to hire a hit man to kill her husband.

A man's children stand by him as he deals with courts in upstate New York.

The investigation into the death of a woman whose remains were found in her Frisco, Texas, garage.

The investigation into the disappearance of a Marine's 19-year-old wife in the California desert.

Police initially suspect natural causes as they investigate a man's death.

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

A son uncovers a dark family conspiracy following a man's apparent suicide.

The investigation into a Washington businessman's death leads to a North Dakota oil field.

A man who was acquitted of the murder of his ex-girlfriend's 12-year-old son tells his story.

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