Thirty-six years after he jumped out of a 727 clutching a bag full of cash, the mystery of D.B. Cooper is getting another look at by the FBI. The FBI has posted some new details in this cold case and are, once again, asking the public for help.

On Nov. 24, 1971, a non-descript man calling himself Dan Cooper approached the counter of Northwest Orient Airlines in Portland, Oregon. He used cash to buy a one-way ticket on Flight #305, bound for Seattle, Washington.

He hijacked the plane, and after letting the passengers go in exchange for cash and some parachutes, ordered the plane's staff to fly towards Mexico. He parachuted out of a plane in the driving wind and rain, somewhere between southern Washington state and just north of Portland, Oregon.)

For 36 years, the FBI wondered who was Cooper? Did he survive the jump? And what happened to the loot, which only a small part of which has ever surfaced?

The FBI has run down thousands of leads and considered all sorts of scenarios. And amateur sleuths have put forward plenty of their own theories. Yet the case remains unsolved.

Special Agent Larry Carr, who said he likes to pick up cold case files when he has a free moment, believes this mystery can be solved.

"No one has ever looked the case this way," said Carr in a recent interview with the media.

Carr reignited the case with help from new technologies, like DNA testing.

During the hijacking, Cooper was wearing a black J.C. Penney tie, which he removed before jumping. It later provided Carr with a DNA sample.

"The clip-on tie left behind still had DNA on it, and it was that of a man named Dan Cooper who lived in Seattle and purchased a ticket (in the name of D.B. Cooper)," Carr said.

As many agents before him, Carr thinks it's highly unlikely that Cooper survived the jump.

"Diving into the wilderness without a plan, without the right equipment, in such terrible conditions, he probably never even got his chute open," Carr said.

That might very true, as Cooper asked for four chutes, and he jumped with two, including one that was used for instruction and had been sewn shut. He used the cord from one of the remaining parachutes to tie the stolen money bag shut.

Still, we'd all like to know for sure, and Carr thinks you can help.

"Maybe a hydrologist can use the latest technology to trace the $5,800 in ransom money found in 1980 to where Cooper landed upstream. Or maybe someone just remembers that odd uncle," Carr said.