In late 2007, the FBI announced that a partial DNA profile had been obtained from three organic samples found on Cooper's clip-on tie in 2001, though they later acknowledged that there is no evidence that the hijacker was the source of the sample material. "The tie had two small DNA samples, and one large sample," said Special Agent Fred Gutt. "It's difficult to draw firm conclusions from these samples." The Bureau also made public a file of previously unreleased evidence, including Cooper's 1971 plane ticket (price: $20.00, paid in cash), and posted previously unreleased composite sketches and fact sheets, along with a request to the general public for information which might lead to Cooper's positive identification.