In Adams v. Maryland, 347 U.S. at 181, 74 S.Ct. 442, 98 L.Ed. 608 (1954), in rejecting a construction that a statute providing that no testimony before a congressional committee 'shall be used as evidence in any criminal proceeding against him in any court' was inapplicable where the witness had not objected, Mr. Justice Black said: "Indeed, a witness does not need any statute to protect him from the use of self-incriminatory testimony he is compelled to give over his objection. The Fifth Amendment takes care of that without a statute."