48 Hours

The murders of a beloved doctor, his wife and their young daughter leave their Santa Barbara, Calif., community reeling; a manhunt leads to the arrest of a suspect who prosecutors say is a conman.

When a young mother goes missing, trained tracker and detective Dakota Black launches an investigation that locates the murdered woman.

A stalker sends menacing messages to a young mother before she is murdered. The investigation reveals a sinister setup. In this week's 48 HOURS, correspondent Peter Van Sant reports on how law enforcement unraveled the case, including why a person of interest believes the spirit of the victim gave him "the urge" to buy a sweatshirt that ultimately helped clear his name.

Molly Bish was just 16 years old when she went missing on June 27, 2000. She vanished after being dropped off at her lifeguarding job. What followed became the largest search in Massachusetts history. Her remains were eventually discovered, but her killer has never been identified. Decades later, Bish's sister turns to social media, sharing her family's story and urging the public to help generate new leads. 48 HOURS correspondent Erin Moriarty reports on the renewed push for answers.