Det. Craig Whitfield speaks about his own personal tragedy and how it's impacted his work.

Delia Lerma was found stabbed to death in her own car within hours of being reported missing, but who killed her is a mystery to this day.

After her family can't get ahold of her, young mother Bethany Decker is reported missing.

Preview: When a woman was violently attacked, she miraculously survived and was able to tell her story in vivid detail.

Preview: Bethany Decker's family realized something was wrong when they found she'd left behind her purse, keys, and car during a move.

Learn more about former South Carolina attorney Alex Murdaugh's shocking crimes, including killing his wife and son.

Find out more about the complex case in which Doug Benefield was shot and killed by his estranged wife Ashley, who claimed ...

Learn more about teacher Simeonette Mapes Crupi's shocking 2012 death and the suspect at the center of the investigation.

The new true-crime series, hosted by Oscar-nominated actress June Squibb, chronicles shocking cases involving a killer no one ...

Find out how Las Vegas detectives solved the homicide case of a widowed mother who was found beaten and strangled and dumped ...

Learn what the evidence revealed about Nelllie Hocutt's brutal 2003 murder in a preview for The Death Investigator with ...

Find out new details about an infamous series killer and his homicidal calling card in the new Oxygen documentary The Boston ...