This hijacker told a flight attendant he had a bomb, demanded a $200,000 ransom, and demanded four parachutes upon landing in Seattle. After releasing the passengers in Seattle, the hijacker told the crew to refuel the plane and begin a second flight. About 30 minutes after takeoff, the hijacker opened the plane's rear door, deployed the stairs, and parachuted out into the night with the ransom.
And that's all. He wasn't caught, we don't know who he was, we don't know what he looks like, so I can't draw his portrait here.
https://en.wikipedia.org/wiki/D._B._Cooper