Transcript for JC Penney Tie May Crack the 45-Year-Old D.B. Cooper Hijacking Mystery
It is one of the most enduring mysteries of our time. The infamous D.B. Cooper hijacking. The FBI investigation is over, but a team of amateurs not so quick to throw in the towel. ABC's Neal Karlinsky reports on their potentially groundbreaking new evidence. Reporter: Tonight, the D.B. Cooper cold case is growing warmer. A team of scientists say this JCPenney tie left behind by the hijacker is providing new clues thanks to a powerful electron microscope. This is the only piece of evidence that is from D.B. Cooper himself. He was careful to take all the notes and everything else he touched with him. Reporter: The legend of cooper was born 45 years ago when a still unknown man hijacked a boeing-27 and got away with ransom money, never to be seen again. They say the infamous tie includes tiny particles of rare Earth elements used in a Boeing high-tech supersonic jet program back then. The hijacking took place near the backyard of Seattle leaving volunteer detectives to wonder if D.B. Cooper was a Boeing employee. We feel this evidence narrows the world that he lived in, and maybe now we have a chance of finding him. Reporter: The FBI closed the D.B. Cooper case just a year ago, and while there are no plans to reopen it, investigators are hoping these new leads could bring in new tips. Cecilia. A fascinating mystery. Thank you.
This transcript has been automatically generated and may not be 100% accurate.