answer questions asked by a federal grand jury as to the whereabouts of such books and records which he has not produced pursuant to subpoena. For the reasons hereafter stated, we hold that the privilege against self-incrimination attaches to such questions.
In April 1956, a special grand jury in the United States District Court for the Southern District of New York was investigating racketeering in the garment and trucking industries in New York City. This investigation followed widespread charges of racketeering in labor unions, including specific charges that seven local unions had been recently chartered by a faction of the International Brotherhood of Teamsters to gain control of the Teamsters’ New York Joint Council, and that these “phantom unions” were controlled by a group of gangsters, ex-convicts and labor racketeers.
Petitioner, Joseph Curcio, the secretary-treasurer of Local 269 of the International Brotherhood of Teamsters, one of the alleged “phantom unions,” was subpoenaed to appear before the grand jury, and to produce the union’s books and records. There were two subpoenas — a personal subpoena ad testificandum and a subpoena duces tecum addressed to him in his capacity as secretary-treasurer of Local 269. On several days he appeared before the grand jury but failed to produce the demanded books and records. He testified that he was the secretary-treasurer of Local *269;* that the union had books and records; but that they were not then in his possession. He refused, on the ground of self-incrimination, to answer any questions pertaining to the whereabouts, or who had possession, of the books and records he had been ordered to produce.
The District Court, after a hearing in which petitioner attempted to justify his claim of privilege, directed petitioner to answer 15 questions pertaining to the where