 Subsequently, he was questioned intensely in the IMF about his activities, but he was not sanctioned or removed from his duties.In late 1952, he was called before a Grand Jury in New York (presided over by Senator Herbert O'Conor) and then before the McCarran Committee on December 1, 1952, both of which were investigating alleged Communist affiliations of U.S. citizens working for the United Nations and other international organizations.On the latter occasion, he declined to answer the question of whether he was a member of the Communist Party on Fifth Amendment grounds, citing the example of Alger Hiss's conviction for perjury.