Katherine Horsford

In 1999, four women are found dead in Yosemite National Park. Former FBI Agent Jeffrey Rinek was the lead investigator on the case and shares details from the investigation, as well as how he was able to obtain a confession from the killer himself.

In part two of this story, former DEA Special Agents Javier Peña and Steve Murphy detail the capture and final moments of the notorious drug lord, Pablo Escobar.

Pablo Escobar was one of the world's richest and most dangerous men at the height of his drug smuggling career until two American DEA Special Agents joined the Colombian authorities to take him down.

Maura Murray has been missing for 19 years. Julie Murray, Maura's older sister, discusses the details of her sister's disappearance, her efforts to uncover more information, and the impact the case has had on her family.

On October 1st, 1993, 12-year-old Polly Klaas and two of her friends had planned a sleepover after school. It was a night filled with dancing, goofing off, and playing games, but it would soon take a turn for the worse.