David Truong (born Trương Đình Hùng, September 2, 1945 – June 26, 2014) was a South Vietnamese national who lived in the United States and partook in the anti-Vietnam War peace movement.
Truong was the son of South Vietnamese politician Trương Đình Dzu, a candidate for the presidency in the 1967 elections against Nguyễn Văn Thiệu.
The documents had been provided to him by Humphrey, a United States Information Agency employee, to be passed on by Truong to Vietnam via a woman who turned out to be a double agent for the CIA and the FBI.
The spy ring routed purloined classified information through Vietnam's United Nations mission in New York and its French Embassy in Paris.
The ambassador had been named an unindicted co-conspirator when Truong and his accomplice, United States Information Agency employee Ronald Humphrey, were indicted.