Green River Killer: Gary Ridgway · 31 Aug 2026 · 12 min

The Swab in the Locker: How One Sample Survived Fourteen Years

In 1987, detectives left Gary Ridgway's home with a saliva swab and no case — then waited fourteen years for the science to catch up. This episode traces how the Green River Killer survived two police visits, a polygraph, and a formal evidence search before a single stored sample finally closed the longest murder investigation in American law enforcement history.

Green River Killer: Gary Ridgway
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The Swab in the Locker: How One Sample Survived Fourteen Years

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What's covered

In nineteen eighty-seven, police walked out of Gary Ridgway's house with a saliva swab, a search warrant's worth of physical evidence, and no way to charge him. He went back to work the next morning.

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