Sheridan Peterson, long considered a suspect in the D.B. Cooper skyjacking case, died Jan. 8 in northern California, according to memorials website Legacy.com. He was 94.

The California native served in the U.S. Marine Corps during World War II and later worked as a technical editor at Boeing, the aerospace manufacturer based in Seattle.

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He also was an experienced smokejumper. He loved skydiving and taking physical risks, even reportedly “experimenting with homemade bat wings.” These were keys reasons his name has flitted for years around internet message boards devoted to the D.B. Cooper case, the only unsolved skyjacking in U.S. history.

A man using the name Dan Cooper hijacked Northwest Orient Flight 305 out of Portland on Nov. 24, 1971. He parachuted out of the plane with $200,000 in ransom — and disappeared. This led to the skyjacker becoming a folk hero. The case has inspired books and documentaries and even a feature film.

Read more at Oregon Live.