Cleared by a Machine: The Polygraph That Kept Ridgway Free
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Cleared by a Machine: The Polygraph That Kept Ridgway Free
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ナレーター：
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著者：
(00:00:38) A Witness They Couldn't Ignore
(00:01:56) The Test That Cleared Him
(00:03:19) The Killing Continued
(00:04:19) The 1987 Search
(00:05:29) Why Vulnerable Victims Made Him Harder to Catch
(00:07:00) What 2001 Changed
(00:08:05) The Plea Deal and What It Cost
(00:09:19) The Victims He Couldn't Give Back
(00:10:20) The Gap Nobody Talks About
In 1984, Gary Ridgway — already a named suspect with a credible eyewitness linking him to a victim — sat down for a polygraph examination and passed. The Green River Task Force, stretched across hundreds of leads and millions of dollars of investigative work, moved their focus elsewhere. Ridgway went back to his job at Kenworth Truck Company and back to killing.
This episode traces the critical window between 1983 and 1998: the moment Marie Malvar's boyfriend identified Ridgway's pickup truck, the 1984 polygraph that functioned as an unofficial clearance, and the 1987 search of Ridgway's home that produced a saliva sample — evidence that sat in a storage locker for over a decade because the DNA technology to use it didn't yet exist.
The timeline is staggering. From the polygraph to Ridgway's last confirmed murder spans nearly fourteen years. Every killing in that window represents a direct consequence of a test that has never been a reliable truth-detection instrument — and that investigators in 1984 treated as a verdict.
This chapter also examines why Ridgway was so difficult to catch for so long: his deliberate selection of women working in prostitution and young runaways in South King County, whose disappearances drew less institutional urgency. It wasn't just a technology failure. It was a systemic failure to treat the victims as people whose lives demanded the same investigative response as anyone else's.
The evidence existed. The biology was in a police locker. The case just couldn't be read yet — and the cost of that delay was measured in lives.
This episode includes AI-generated content.
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