PORTLAND, Ore. (KOIN) — The 51st anniversary of the D.B. Cooper hijacking at Portland International Airport is two weeks away and an amateur investigator has revealed new leads in the case.

In Downtown Vancouver Friday morning, Eric Ulis shared a picture of the man he now thinks was D.B. Cooper.

The man, Vince Petersen, died in 2002, but Ulis now thinks that he is the man behind the 1971 skyjacking.

Petersen coincidentally shares an almost identical last name to Sheridan Peterson who was considered for many years to be D.B. Cooper.

MORE COVERAGE

This undated artist sketch shows the skyjacker known as D.B. Cooper from recollections of the passengers and crew of a Northwest Airlines jet he hijacked between Portland and Seattle on Thanksgiving eve in 1971.
FILE–This undated artist sketch shows the skyjacker known as D.B. Cooper from recollections of the passengers and crew of a Northwest Airlines jet he hijacked between Portland and Seattle on Thanksgiving eve in 1971. Nearly 50 years after skyjacker D.B. Cooper vanished out the back of a Boeing 727 into freezing Northwest rain, wearing a business suit, a parachute and a pack with $200,000 in cash, a crime historian is conducting a dig on the banks of the Columbia River in Vancouver, Washington, in search of evidence. (AP-Photo/File)
DB Cooper search_326361

EXPLAINER: How DB Cooper jumped into history, became a PNW legend

Peterson passed away in 2021 at the age of 94, and Ulis says he eventually ruled him out as a suspect.

Ulis says he traced a rare form of titanium found on the black tie the D.B. Cooper left behind on the Boeing 727 to a laboratory where Petersen worked near Pittsburgh, Pennsylvania.

“The titanium lab consisted of about 8 men. That’s it,” Ulis said. “A very small universe of engineers who worked in the titanium research lab. The men in the research lab did wear ties. We have photographs of guys in the research lab wearing ties.”

Ulis is asking for people who remember Petersen to contact him to help fill in the blanks.

He says the current owner of Petersen’s house is allowing him to search the property for the ransom money, parachute, briefcase, or any other clues about D.B. Cooper.