Letter #3 -- This letter was sent to the Portland Oregonian, however, that paper never published the letter or even discussed the letter in their newspaper. In fact, the Oregonian editors even denied the existence of the letter as did the FBI. The letter did exist and was a cut and paste letter that was mailed to the newspaper from somewhere in Portland with a cancellation date stamped Wednesday, December 1, 1971. The whereabouts of this letter are unknown (although I have seen the envelope to this letter). The letter reads, "Am alive and doing well in home town P.O. The system that beats the system. D.B. Cooper."
My analysis: The letter writer is going back to the original scene of the crime, Portland, and will now thoroughly confuse his pursuers - the FBI. I recently received mysterious e-mails from a person named "Al." He is helping me analyze the Oregonian letter and he claims that this letter was cut from the June and July 1970 issues of Playboy magazine. He used a special "colorization" process to support this assertion. It is one that I examined closely, and he is right. The phrase, "the system that beats the system" was taken from an advertisement in Playboy concerning a particular stereo system manufacturer.
"Al" won't reveal his true identity to me, but I've often wondered if he is a retired FBI agent from the Portland area. And, my research shows that Playboy and its publisher, Hugh Hefner, were the target of a huge FBI file. J. Edgar Hoover thought that Hefner and Playboy were subversive to the American lifestyle and needed to be investigated. Maybe D. B. cooper knew something about this. Gossett was a HUGE fan of Playboy and subscribed for years.
Letter #4 -- This was the last letter and sent again to the Reno Evening Gazette. It was not published, but the newspaper did make mention of it in their Friday, December 3, 1971 edition. It was cut and paste: "Plan ahead for retirement income. D.B. Cooper." The whereabouts of this letter are unknown, but I've heard the FBI took possession of it.
Analysis of all letters: D.B. Cooper got away unscathed on the night of Wednesday, November 24, 1971 and proceeded down to California while his pursuers were looking for him about 35 miles to the north of his actual parachute landing zone. He sent the first letter to let the world know that he was alive. Next, he traveled to Canada with the money and wrote again. I think he took the bus. He left Canada (by bus) and cruised back down to Portland to wave at the FBI who was looking for him 35 miles to the north of Portland. He mailed #3 from the Portland area to further confuse law enforcement. At this point, he's having too much fun. Then he went back down towards Sacramento, CA and sent the final letter, letting everyone know that he was now set for retirement. Gossett would have returned back to the Salt Lake City area and not have sent out any letters from there for fear of being caught.