DNA, Dedicated State Trooper Help Solve 20-Year-Old Cold Case Pennsylvania | NBC Nightly News

In custody now, Timothy David Nelson was caught and charged with sexually assaulting a 10-year-old girl with the help of DNA evidence and a state trooper who never gave up the hunt.
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DNA, Dedicated State Trooper Help Solve 20-Year-Old Cold Case Pennsylvania | NBC Nightly News

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