Career
As an Army Sgt assigned to National Security Agency, he was not subject to a polygraph examination. When he retired from the Army his Soviet handlers told him to apply for a civilian position, which he did. He was given a polygraph examination by National Security Agency on a Friday and while he passed the examination, the examiner told the Federal Bureau of Investigation there was something that made him uneasy and he told Dunlap to come back on Monday.
Dunlap committed suicide over the weekend.
The Director of Security for National Security Agency told Federal Bureau of Investigation Agents that he and his Assistant paid a visit to Dunlap"s widow to offer their condolences and that is when she said, "You probably want his papers", and showed them classified material. That is when National Security Agency realized Dunlap had been a spy.
Dunlap was a personable individual and sort roamed around within National Security Agency. One secretary told the Federal Bureau of Investigation that he stopped at her desk to chat and would see papers in her out box and tell her he was headed in that direction and take the papers. He would stop at a Xerox machine on the way and make a copy for the Soviets.
Dunlap committed suicide by carbon monoxide poisoning on July 23, 1963.