(CNN) A US Air Force officer with top-secret clearance who went missing in 1983 has been living under an assumed name in California, according to the Air Force Office of Special Investigations.

Capt. William Howard Hughes Jr. disappeared in July of 1983 after returning from duty in Europe. He was last seen in New Mexico withdrawing $28,500 from his bank account at 19 different branch locations, the Air Force said in a statement.

Interviews with Hughes' friends and associates and inquiries with law enforcement agencies in the US and abroad failed to locate him, the statement said, and he was formally declared a deserter on December 9, 1983.

Then just a few days ago, the mystery that began more than three decades ago came to an end.

"On June 5, during a passport fraud investigation, the US Department of State's Diplomatic Security Service interviewed an individual claiming to be Barry O'Beirne. After being confronted with inconsistencies about his identity, the individual admitted his true name was William Howard Hughes Jr., and that he deserted from the US Air Force in 1983," the Air Force said.

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