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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Israel Keyes, confesses to raping and killing the barista, torturing and killing a married couple in Vermont, raping the wife as well. Is his story true? Vermont cops search for evidence, while the FBI asks him: who else have you killed?

Originally Aired: 12/05/24

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A new interview with Gabby Petito’s parents reveals what we haven’t heard before about the case.

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A New Jersey radio host's murder is the focus. Included: her daughter's five-year fight for justice; and the victim's husband's alleged involvement in her murder, with links to his ties to an illegal drug-distribution ring.

Originally aired: 06/22/18

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Israel Keyes, confesses to raping and killing the barista, torturing and killing a married couple in Vermont, raping the wife as well. Is his story true? Vermont cops search for evidence, while the FBI asks him: who else have you killed?

Originally Aired: 12/05/24

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The investigation into a multimillion-dollar con in a close-knit community helps investigators uncover the murder of a young father. 

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A high school cheerleader is shot by an ex-boyfriend, who claims it was an accident, during an attempt to get her back

Originally aired 9/14/18

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Harold Henthorn calls 911 to report that his wife Toni has been gravely injured after falling off of a cliff on a remote trail. National Park Service Special Agent Beth Shott uncovers suspicious details and inconsistencies in Harold's story.

Originally Aired: 12/05/24

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When an insurance agent is murdered in his office, evidence points to a secret relationship — until new DNA technology helps authorities find the real killer.

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The case of a 50 year-old teacher who ran off with his teenage student, leading her across the United States. Tad Cummins is alleged to have kidnapped Elizabeth Thomas, with suggestions of using mind control, and planned to kayak to Mexico.

Originally aired: 05/05/17

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For over a decade, a suspect in the Gilgo Beach killings remained at large until authorities arrested family man Rex Heuermann, who they say lived a double life. Go inside the investigation of the man charged with murdering seven women.

Originally Aired 01/16/25

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A loving husband is found murdered in his home. Weeks later, his wife receives a chilling death threat on her doorstep. Investigators are left to unravel a web of dark secrets dating back decades.

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DNA detective CeCe Moore's use of crime scene evidence and a genealogical website leads to an arrest in a cold case from 1992.

Originally aired: 10/05/18

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Jackson State University junior Latasha Norman's promising future comes to a tragic end when she goes missing following an afternoon class, then she is found murdered in a wooded area in Jackson, Mississippi.

Originally Aired: 02/22/24

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A loving father is killed when his car explodes. Could a fresh look at DNA change the case?

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The disappearance of a couple preparing to sell the yacht they had been living on to move closer to their new grandchild.

Originally aired: 01/17/20

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