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DB Cooper: The Definitive Investigation

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EU:
Sheridan Peterson.
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377:
I have not seen the full report, but how do you get yttrium on Sheridan? Even if Boeing had color CRTs, they are vacuum sealed and have no external phosphors. He was not working where tubes might be broken. Broken tubes have toxics and glass shards. They wouldn’t just be casually tossed in scrap bins. Sheridan had ALL the skills but I don’t see how he got ALL the tie elements. Scrap bins might have titanium, aluminum and bismuth but yttrium seems a real stretch.

377

EU:
You are not allowed to view links. Register or LoginI have not seen the full report, but how do you get yttrium on Sheridan? Even if Boeing had color CRTs, they are vacuum sealed and have no external phosphors. He was not working where tubes might be broken. Broken tubes have toxics and glass shards. They wouldn’t just be casually tossed in scrap bins. Sheridan had ALL the skills but I don’t see how he got ALL the tie elements. Scrap bins might have titanium, aluminum and bismuth but yttrium seems a real stretch.

377

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Yes yttrium was used in cathode ray tubes as well as an additive for titanium and aluminum. It was also used in color TVs and radar hardware. Simply put, it was and is everywhere, including Boeing and at home. Regarding how a trace of it ended up on his tie, I don’t know. That said, it is very easy to put Sheridan and yttrium in the same room at the same time. E

377:
How can you be so certain that the FBI didn't eliminate Sheridan Peterson as a viable suspect based on DNA tests? Silence doesn't necessarily mean it was a possible match. They did announce results on Duane Weber and LD Cooper DNA tests, but those were high publicity cases. When Sheridan was tested there was little or no press interest in him.

Your position that the FBI never cleared Sheridan on DNA is in dispute. Sheridan says in his July 2007 Smoke Jumper magazine article: "Several days later, one of the agents paid me a second visit. She assured me that there were no matches for my DNA."

I know Sheridan Peterson. He told me some wild tales about sport jumping in Vietnam during the war, something that I initially suspected was exaggerated or even made up. A friend who served in the RVN Army as a paratrooper and also made skydives with the Saigon Sport Parachute Club verified every last detail of Sheridan's account including DZ location, aircraft used and anecdotes about the clubs tyrannical leader Duffy. His stories about being in Beijing and witnessing the Tiananmen Square massacre were also met by some skepticism on my part but it later checked out through independent sources. In short, I have found him to be truthful. How can you be so sure he is not truthful about the FBI clearing him on DNA?

377

377:
This is from the above referenced Smoke Jumper article authored by Sheridan: " Soon after the 1971 heist, agents visited his mother [Sheridan's ex] at her high school counseling office in Bakersfield, Calif. They wanted to know where her ex-spouse was; she said she had no idea.“Could he have been D.B. Cooper?” they asked. “Yes, that sounded like something he’d do,” she said.

Bitter ex trying to nail Sheridan or an accurate observation of his character?

Sheridan has no prior criminal record. He passed DOD and DOE security investigations for program clearances. Honorably discharged Marine, WW 2 vet. USFS Smoke Jumper. Civil rights worker in the South during the 1960s. Public School teacher. Hardly a shifty grifty background.

377

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