Nelson C. Drummond was an African American Navy yeoman assigned to Naval Station Newport in Rhode Island who was recruited by the Soviet Union in 1958 to pass secret documents to them in exchange for money. Arrested in 1962, Drummond was later convicted of espionage and sentenced to life in prison. He was the first African American ever convicted of espionage.
(From: American Spies: Espionage Against the U.S. from the Cold War to the Present)