Ronald Humphrey (born c. 1936) was a United States Information Agency (USIA) official who was convicted of spying for North Vietnam.
He and co-conspirator David Truong (born Truong Dinh Hung), the son of a South Vietnamese politician Trương Đình Dzu, were arrested in 1977 and charged with conspiracy, espionage, theft of classified information and failing to register as foreign agents.
[1] Truong was a South Vietnamese expatriate living in the United States who was active in the anti-Vietnam War movement.
His father had run against Nguyen Van Thieu on a peace platform.
Some of the documents were used by the North Vietnamese and Viet Cong negotiators at the Paris Peace Conference.