Note 877 — AMENDMENT 14 (continued 4)

In several decisions the Court, assuming, but without deciding, that a State law requiring a witness to answer incriminating questions would violate the due process clause, has then proceeded to conclude, nevertheless, that a State antitrust law which grants immunity from local prosecution to a witness compelled to testify thereunder is valid even though testimony thus extracted may later serve as the basis of a federal prosecution for violation of federal antitrust laws.—Jack v. Kansas, 199 U.S. 372, 380 (1905).