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Young mom Brigida Uto loved running and chasing her toddler around. When her health suddenly collapsed, doctors had to unravel a medical mystery to save her life. Then, the FBI joined the confounding case and uncovered a sinister plot.

When the death of a 59-year-old father is found to be unrelated to his ongoing health issues, police begin an investigation and question some of his family members.

A dancer is murdered in her Virginia home; after interviewing a series of suspects, detectives realize the case is much more complicated than previously thought.

A man disappears after a duck hunting trip in Florida on his sixth wedding anniversary and is later found to have been murdered.

Anchors and correspondents cover developing domestic and international news stories and political events along with investigative pieces and featured segments that spotlight Americans who have made the lives of those around them better.

Anchors and correspondents cover developing domestic and international news stories and political events along with investigative pieces and featured segments that spotlight Americans who have made the lives of those around them better.

A murder case considered closed by North Dakota detectives is suddenly reopened when a confidential informant comes forward with a tip about an unlikely suspect.

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.

The investigation into the death of Spokane, Wash., businessman exposes a web of malevolence extending from the Pacific Northwest to a North Dakota oil field.

An in-depth look at the journalists who exposed the dangers of cult leader Reverend Jim Jones; interviews with witnesses to murders carried out by Jones' followers.

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

When a mother of four dies unexpectedly on Valentine's Day, her death is attributed to natural causes, but a detective suspects that someone murdered the woman.