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The exhaustive investigation into the murder of Tangie Sims; how genetic genealogy gave investigators the break they'd been waiting for.

A 69-year-old woman is found brutally murdered in 2011; after the case goes cold, new DNA technology eventually leads detectives to the truth.

Following the decades-long investigation into the murder of Helene Pruszynski.

How an extensive investigation and revolutionary science of familial DNA revealed an attacker's identity.

A 21-year-old college student is found murdered; the case remains cold for nearly 40 years until a new detective uses an innovative method to catch her killer.

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.

Paid programming.

Paid programming.

Transform your bath affordably in just one day!

Learn what's behind mental decline with age, and how to improve memory, focus and concentration with NeuroQ's Darrin Peterson and Dale Bredesen MD.

When a dog trainer with celebrity clientele disappears, investigators track down a suspect with the help of two witnesses.

Investigators seek answers when a prosecutor and a district attorney and his wife are murdered within a couple of months of each other.

The disappearance of a 20-year-old honors student causes her family to fear the worst; decades later, the mystery is solved.

Susie Casey, an outgoing mother of four, is going through a divorce when she vanishes; police investigate three men.

When a young, handsome veterinarian is found dead in his home in Montana, the mystery remains unsolved for nearly two decades.

Massachusetts Marine; Yeti; Terrorized Teen; Biker and the Vet; Killer Boyfriend.

Texas Crime Spree; Inside Frontera; Deadly Doses; The Entity.

Missing on a Cruise; Taunting Bank Robber; DEA Agent Death; Bullock's Deadwood; Up in Smoke; Danny and His Dad.

Mrs. Rogers; Plateau Vision; Update: War of the Depues; Killer Boyfriend; Medford Millions; Looking for Christopher.

Skullduggery; Lucky School; Deadly Doses; Drug Playboy; Eleven Million Dollar Heist; Fallen Star.

Paid programming.

Paid programming.