A serial rapist seals his own fate when he sends a taunting letter to police. And when a man is found dead in South Dakota, his head bashed in by a 50-pound rock, investigators go on a 20-year search for the killers. This Episode is sponsored by BetterHelp BetterHelp: Visit <a href="http://BetterHelp.com/COLDCASE" rel="noopener noreferrer" target="_blank">BetterHelp.com/COLDCASE</a> to get 10% off your first month. Figs: Check out <a href="http://Wearfigs.com" rel="noopener noreferrer" target="_blank">Wearfigs.com</a> and use code FIGSRX for 15% off your first order! Progressive: Multitask right now. Quote your car insurance at <a href="http://progressive.com/" rel="noopener noreferrer" target="_blank">Progressive.com</a> to join the over 28 million drivers who trust Progressive. Rosetta Stone: Cold Case Files listeners can get Rosetta Stone’s lifetime membership for 50% off when you go to <a href="http://RosettaStone.com/coldcase" rel="noopener noreferrer" target="_blank">RosettaStone.com/coldcase</a>See Privacy Policy at <a href="https://art19.com/privacy" rel="noopener noreferrer" target="_blank">https://art19.com/privacy</a> and California Privacy Notice at <a href="https://art19.com/privacy#do-not-sell-my-info" rel="noopener noreferrer" target="_blank">https://art19.com/privacy#do-not-sell-my-info</a>.

REOPENED: Dark Angel

Based on the iconic, Emmy-nominated series on A&amp;E, this show explores some of the most difficult-to-solve murders, which stymied investigators and went cold, sometimes for decades. In fact, one-third of all murders in America remain open. But thanks to dogged investigators and breakthroughs in forensic technology, these cases become part of the rare 1% of cold cases that are ever solved. Cold Case Files is narrated by Marisa Pinson.