Portland, Oregon, November 24th, 1971, Thanksgiving [music] Eve. A man in a black suit bought a one-way ticket to Seattle with $20 cash. He gave his name as Dan Cooper. He ordered a bourbon and soda after [music] boarding. 30 minutes into the flight, he passed a note to the flight attendant. He had a bomb. He wanted $200,000 in $20 [music] bills and four parachutes waiting in Seattle. The plane landed in Seattle. All 36 passengers [music] were released in exchange for the money. The plane refueled. Cooper kept the crew. They took [music] off for Mexico City. Somewhere over the forests of southwest Washington [music] at 8:00 p.m. in a thunderstorm, Cooper lowered the rear staircase of the aircraft [music] and jumped into the dark. He was never found. The FBI [music] opened one of the longest investigations in its history. More than 800 suspects in 5 years, everyone eliminated. [music] In 2016, the FBI closed the active investigation. [music] In 1980, an 8-year-old boy smoothing sand for a campfire [music] on the Columbia River found rotting $20 bills still bound [music] by rubber bands. Serial numbers matched Cooper's ransom. $5,800 [music] of $200,000. It is still the only physical evidence ever found [music] outside the aircraft. The tie Cooper left on the plane contained over 100,000 microscopic particles, including rare >> [music] >> metals, bismuth, unalloyed titanium, found in specialized manufacturing facilities, possibly connected to Boeing. His tie may tell us exactly [music] who he was. Nobody has matched it to a name. Of the four parachutes handed to Cooper in Seattle, one >> [music] >> had been sewn shut. A training chute. Unusable. Nobody knows [music] which parachute he used. If he took the wrong one, he never survived the jump. If he took the right one, he walked out of those [music] forests with $200,000 and lived a full life somewhere >> [music] >> under a name nobody has ever connected to a man in a black suit [music] on Thanksgiving Eve 1971. If you need help, reach out. [music] You are not alone. Like this video and subscribe to Grave File TV. We open a new case every single week. The FBI has [music] never named him. 54 years later, do you think D.B. Cooper [music] survived that jump? Or is he still somewhere in those trees?