An update to a story we posted last week:  Turns out the new lead in the 1971 plane-jumping case turned out to be a dud.

DNA testing has failed to link a necktie belonging to the notorious hijacker 'D.B. Cooper' with a new suspect in the 40-year-old case, the FBI says.

Marla Cooper recently came forward with the belief that her uncles were involved in the hijacking and had a necktie that FBI tried to obtain the matching DNA from.

Marla Cooper provided the FBI with some items belonging to her uncle, including a guitar strap.

Fingerprint testing on a guitar strap belonging to L.D. Cooper also proved inconclusive. Investigators are now working with family members to identify other items that could be tested further for fingerprints.