Cold Case Cracked: DNA Technology Unmasks Distant Killer in 21-Year-Old Murder Mystery


This story, titled "The DNA that Unmasked a Killer | True Crime Reports" First published on Al Jazeera English and was retrieved from its original source on November 9, 2026.
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For 21 years, the murder of Leslie Preer remained an enduring mystery. While her husband was long considered a suspect, the case eventually went cold. However, the advent of new DNA technology dramatically shifted the investigation, pointing detectives toward an unexpected individual located thousands of miles away. The challenge then became not only identifying this suspect but also devising a strategy to apprehend him.
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This episode features insights from Dan Morse, a Reporter for The Washington Post, and John McCarthy, the State’s Attorney for Montgomery County.
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