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How To Use DNA To Crack A Case
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How To Use DNA To Crack A Case

Seasoned investigator Paul Holes explains how genetic genealogists and authorities use DNA to heat up cold cases like the Golden State Killer. To help identify unknown suspect or victim DNA from a crime scene, genealogists upload the DNA sample to a database. Then, they reverse-engineer the family tree of the unidentified person by comparing it to the family trees of people with whom they share DNA.