On July 8, 2016 the Seattle F.B.I. announced they were ‘allocating resources dedicated to the D.B. Cooper case to other matters’. Which means they were no longer going to investigate the case. According to a Seattle Times report, the F.B.I. did qualify this statement a bit by adding that if new or compelling evidence came forward, that the Bureau would reopen the case.
But if the Seattle F.B.I. was hoping that the Cooper case would simply ‘go away,’ and the constant tips stop coming in, they were wrong. Seattle F.B.I. agent Ayn Dietrich-Williams admitted the tips just kept on coming, no matter what the F.B.I. did to try and make the public lose interest. The F.B.I. also claimed they had investigated every possible suspect over the years, and checked out all credible tips.
Strangely enough, the F.B.I. has kept other famous cases open, such as the disappearance of Jimmy Hoffa in 1975, as well as the Zodiac serial killer case that predates the Cooper case. Could there be a different, unsaid reason why the F.B.I. chose to close the Cooper case? If so, what could possibly be the reason they did?
Perhaps they had discovered the identity of the hijacker, found out he was dead anyway, and decided to leave it at that. This was the story presented to the staff of Adventure Books of Seattle about a month after the F.B.I. closed the case.