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Arizona Souvenir Killer; Amish Hostage Murder; Coin Scam; Postal Crime; Real Dr. Doolittle; Unknown Mom.

John Branion; No One Spared; Leo Koury; Who Saved My Life?; Angels.

Investigative genetic genealogy solves the 1998 murder of a mother killed in front of her toddler.

Detectives and forensic experts recount the most extraordinary cold cases that were solved using the revolutionary technique of familial DNA testing.

A man uses a dating site to meet and murder a college student.

When a University of Utah athlete is found murdered on campus, investigators learn that she had reached out to the campus police for help multiple times before her death.