On cross-examination, over his objection, is it permissible to ask whether he invoked his constitutional privilege against self-incrimination before the Grand Jury?

On cross-examination, the prosecutor was permitted to ask Halperin, over his objection, whether he had invoked his constitutional privilege against self incrimination before the Grand Jury in response to the same or similar questions in response to which he had testified fully on the trial. Raffel v. United States, 271 U.S. 494, 46 S.Ct. 566, 70 L. Ed. 1054, resolved the issue thus raised in favor of permitting such questioning and we have nothing to add to what has already been written on the subject by this court in United States v. Gottfried, 2 Cir., 165 F.2d 360, 367, and note 18, and the cases there cited.