48 Hours

Investigators struggle to establish a possible motive for a teenage boy who claims he was sleepwalking when he killed his twin sister.

After finding a contractor dead in a corporate parking garage, police hunt for a masked suspect seen vandalizing security cameras.

Police begin to suspect foul play after a woman reports her husband was critically injured in what appears to be an accidental fall down the stairs.

When a photographer and father goes missing from his home without a trace, detectives soon track a suspect with a connection to his ex-wife.

In 1994, a 2-year-old fends for herself after someone murders her mother at home. Decades later, investigators reexamine the cold case.

As the murder of a much-loved doctor and his family leaves friends stunned, police look toward a recent business deal for clues.

A detective specializing in finding missing people takes the lead on a search for a woman whose estranged husband reports her disappearance to police.

Following a missing persons report, police discover a woman dead in her garage where clues quickly point to a suspect — her relentless stalker.

In 2000, a teenage lifeguard disappears and is never found. Twenty years later, her sister launches a social media campaign to uncover the truth.

More than a decade after a woman dies by apparent suicide, her family continues to fight to prove that her husband was responsible for her death.