A man using the name Dan Cooper hijacked Northwest Orient Flight 305 in 1971, collected $200,000, and parachuted from the aircraft. The FBI suspended active investigation in 2016; the file is public.
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The hijacker jumps from the aircraft over southwest Washington.
A child finds bundles of the ransom money on the Columbia River bank.
The FBI redirects resources and stops actively investigating.
Case materials remain available for public research.
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