Dateline

A double homicide in upstate New York leads detectives on a cross-country investigation.

The murder of a young businessman in Old San Juan, Puerto Rico, marks the start of a 15-year-long hunt to find the killer.

Years after a Montana man is found dead, his son searches a box of case files to find answers.

A woman is found murdered after her close friend hears her screaming on the phone.

Melissa Oxley wakes up to find her husband, Ben Oxley, has been shot in the head.

A California woman's two former husbands are mysteriously murdered, nearly 20 years apart.

When Tina Sandoval disappears, her parents and loved ones spend years searching for her.

A Pennsylvania man who was convinced his divorce put a target on his back is found stabbed to death.

When a woman is abducted during her evening shift at a gift shop, investigators work to find her.

More than two decades after a woman's murder, a detective unlocks the mystery of what happened.

A Colorado mother disappears after last being seen grocery shopping on Thanksgiving in 2018.

A 911 call holds the key to solving the mysterious murder of a graduate student.

The Valseca siblings' lives are changed when their father is taken hostage in an orchestrated abduction.

A look back at the 1997 murder of fashion designer Gianni Versace.

When Dr. Teresa Sievers is found murdered in her kitchen, detectives struggle to find any leads until an unexpected tip.

A daughter finds her father, a former FBI agent, murdered at his house.

Rebecca Musser talks about The Fundamentalist Church of Jesus Christ of Latter-day Saints.

A fugitive steals millions of dollars by conning numerous women and businesses over 25 years.

A coroner notices unusual markings on an accident victim's face and becomes suspicious.

A high school senior is found dead in her car after visiting the mall days before Christmas.

Oscar Pistorius kills his girlfriend just eight months after competing in the London Olympics.

Brittany Stork goes on a decades-long quest to find out more about her mother's mysterious death.

Brothers fight to prove their innocence after they were wrongfully convicted for separate murders.

A man claims his wife died by suicide; a suspicious house fire 24 years later raises doubts.