Allison Feldman was a young woman living in Scottsdale, Arizona, whose life appeared to be taking off. Her career as a medical salesperson was thriving; she had a steady boyfriend, a loving family and a wide circle of friends. That all changed one evening when Allison was found brutally beaten and sexually assaulted inside her home. Detectives interviewed the people closest to her, but none matched the most critical evidence: a clear, unknown DNA profile recovered from the crime scene. Allison’s murder remained unsolved for years until advances in forensic familial DNA pointed investigators to a man with no known connection to Allison who held the clues to crack the case wide open. Stream 20/20 ‘Home Alone’ full episode on Disney+ and Hulu (S49, E02).

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