concurring: Since the Court finds that the “spiked” mike used by the police officers penetrated petitioner’s premises sufficiently to be an actual trespass thereof, I join in the judgment.

The motion to strike the supplemental brief on behalf of the respondent is denied. The judgment is reversed. Silverman v. United States, 365 U. S. 505; Ker v. California, 374 U. S. 23.