This story is a collaboration with Biography.com. The case of the elusive D.B. Cooper stands as aviation’s most captivating unsolved mystery since Amelia Earhart vanished without a trace.

The mystery man known as D.B. Cooper sent a letter to newspapers after he parachuted ... Tom Colbert, a Los Angeles TV film producer, said he believes the letter is legitimate. “We have no doubt it’s ...

The FBI’s release of 472 new pages from its D.B. Cooper file gives insight into the frantic search for the “UNSUB” in the days, months, and years after the November 24, 1971, skyjacking of a ...