The 8 Most Intriguing Theories About Skyjacker D.B. CooperCheryl Eddy4/23/15 4:00pm11414EditPromoteDismissUndismissHideGo to permalinkWho is D.B. Cooper? The question has persisted since November 24, 1971, when a mysterious man hijacked a flight from Portland to Seattle, demanded parachutes and $200,000, and skydived into folk-hero history. Cooper’s identity and fate remain unknown — and many theories about both abound.