David Zablodowsky was Senator Joseph McCarthy's Case Number 103. Zablodowsky worked in the State Department and later as Director of the United Nations Publishing Division. He admitted to being a member of an espionage ring in 1936 and having transmitted secret messages between Whittaker Chambers and J. Peters knowing that they were both Communists. After Chambers gave testimony before the McCarran Committee regarding Zablodowsky's activities on October 23, 1952 Zablodowsky admitted his involvement.
- William F. Buckley, Jr., and L. Brent Bozell, McCarthy & His Enemies, The Record And It's Meaning, Regnery Publishing Inc., (1954, 1995 Printing). ISBN 0-89526-472-2