The bureau said in a news release Monday it is releasing new information to the public, including sketches, saying "You can help."

"Would we still like to get our man? Absolutely," the release said. "And we have reignited the case — thanks to a Seattle case agent named Larry Carr and new technologies like DNA testing."

The hijacker who identified himself as Cooper was never seen again. Some of the money was recovered in a mountain area.

Anyone with information on the unsolved mystery may contact the FBI at fbise@leo.gov.