20/20

David Muir investigates how cutting-edge forensic DNA technology has led to long-awaited justice in two murder cases that remained unsolved for decades.
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A mother opens up about her fight to prove her son's innocence of murdering a 19-year-old college student.
Originally Aired: 04/06/18
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Israel Keyes says he killed and demands being promised the death penalty before saying who. The guards find eleven skulls drawn in blood. Who are they? Before he answers, Keyes suddenly shocks everyone with a dramatic and unexpected twist.
Originally Aired: 12/05/24
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A woman falls to her death while hiking in the Rocky Mountains. Was it a tragic accident or a deadly crime?
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A series of rapes in Northern California. The rapist moves down the coast, his crimes escalating to murder.
Originally aired: 05/04/18
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