John Marshall Harlan II

“ This purpose is realized by Rule 41 of the Federal Rules of Criminal Procedure, 18 U.S.C.A., which implements the Fourth Amendment by requiring that an impartial magistrate determine from an affidavit showing probable cause whether information possessed by law-enforcement officers justifies the issuance of a search warrant. Were federal officers free to search without a warrant merely upon probable cause to believe that certain articles were within a home, the provisions of the Fourth Amendment would become empty phrases, and the protection it affords largely nullified. ”

“ At that time a passenger car carrying petitioner's wife and children drove into the yard. The wife rushed to the house and reached the doorway before the federal officers who were then advancing towards it. She sought to block entry by placing her arms across the door, and when informed by Langford of his identity as a federal officer, she demanded to see his search warrant. Langford said that a warrant was not required, and the officers brushed past Mrs. Jones into the house, seizing from the hands of her young boy a shotgun which he was brandishing in an apparent effort to prevent entry. ”

“ The facts of this case impressively bear out these observations, for it is difficult to imagine a more severe invasion of privacy than the nighttime intrusion into a private home that occurred in this instance. ”