Newly released FBI files have revealed a trove of possible suspects related to the DB Cooper case.
This comes decades after the mysterious plane hijacking.
Dan Cooper, a middle-aged white man, hijacked Northwest Orient Airlines Flight 305 on November 24, 1971 on a flight between Portland, Oregon, and Seattle, Washington.
Cooper bought a one-way ticket for the flight, carrying only a briefcase and paper sack with him.
While onboard, he passed a note to the flight attendant, revealing that he had a bomb in his briefcase and demanded $200,000 and four parachutes in exchange for the lives of the 42 people on board.
His demands were met and all of the passengers and most of the crew were set free while Cooper received his ransom in Seattle before telling the pilots to refuel and head to Mexico City.
While the plane flew somewhere over Washington state, he opened the rear staircase and parachuted from the aircraft never to be seen again.
Over the years, the FBI has looked into several possible suspects, relying on the only real piece of evidence Cooper left behind – a JCPenney clip-on tie that he removed before taking his storied leap of faith.
Now, the 472 newly released documents, reviewed by Popular Mechanics, have revealed just exactly who has been considered a suspect in the never-ending mysterious case, including people with expertise in parachuting training, former bank robbers and those with the same last name as the hijacker.