it's long been believed that d.b. cooper had ties to the airline industry due to his use of aviation jargon during the hijacking, the fbi officially closed the case six years ago, but ulis says the new evidence points to a man named vince peterson, a titanium research engineer who worked at that metals factory in pittsburgh, seen here side by side with a rendering of cooper. peterson died in 2002. >> vince peterson. would have been 52 at the time of the skyjacking, and he's six foot one, which is how tall i believe d.b. cooper was. based upon the witness testimony. it doesn't prove, obviously, that vince peterson was d.b. cooper, but it certainly is intriguing. >> ulis says peterson, often flew to seattle for his job, but according to ulis, peterson's son doubts his father could have been involved. $6,000 of cooper's ransom money was found in 1980 by a boy who was camping, but no other cash matching the serial numbers has ever been found. >> what a mystery. t.g.i. friday's says it's closing dozens of restaurants acros

cooper.hanks to a microscopic piece of metal. >> i'm someone who believes that this case can be solved. it's been 52 years. >> back in 1971, a man using the alias dan cooper a northwest airlines plane from portland to seattle, then parachuted over southwest washington with $200,000 in ransom money strapped to his waist. his identity, and whether he survived the jump has remained a mystery, inspiring movies and even a netflix series. >> the treasure is too great. it's too good a story. >> he left behind a tie on the plane. investigators were unable to find dna on it. they did, however, find microscopic pieces of metal on the tie. now private investigator eric ulis says new tests have found one of those metal fragments could have only come from a metals factory that was located in pittsburgh at the time. >> it appears that d.b. cooper came from the titanium research lab of this rem crew. titanium ulis tells the sun newspaper. >> the metals factory made parts for boeing planes. it's long been be

but his daughter doesn't believe she was d.b. cooper. what has she told you about her father and the person he was? >> she was 6 years old at the time of the sky jacking in 1971. she remembers her father being a kind person. the kind of person that wasn't be involved in anything like this. at the end of the day, there's stories out there of people that pull off crimes or things of this nature. they manage to get away with it, because people around them, is no way in 1,000 years would they believe this person was involved. it's appealing to the fbi to get access to that clip-on tie and run a dna test on it. if we get access to the tie, ten minutes here, we can determine if her father was d.b. cooper. if it wasn't her father, who it was. at that point, we have a dna profile to use 2024 state-of-the-art technology. >> you have to keep us posted. this has always been a very fascinating story. he parachuted out of the plane, whoever this d.b. cooper was. thank you so much. >>> thank you all for watching. our r coverage c continues.. i think h

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