Decisions of this Court applying the principle of the Boyd case have settled these things. Unjustified search and seizure violates the Fourth Amendment, whatever the character of the paper; whether the paper when taken by the federal officers was in the home, in an office, or elsewhere; whether the taking was effected by force, by fraud, or in the orderly process of a court’s procedure. From these decisions, it follows necessarily that the Amendment is violated by the officer’s reading the paper without a physical seizure, without his even touching it; and that use, in any criminal proceeding, of the contents of the paper so examined—as where they are testified to by a federal officer who thus saw the document, or where, through knowledge so obtained, a copy has been procured elsewhere—any such use constitutes a violation of the Fifth Amendment.
The protection guaranteed by the Amendments is much broader in scope. The makers of our Constitution undertook to secure conditions favorable to the pursuit of happiness. They recognized the significance of man’s spiritual nature, of his feelings, and of his intellect. They knew that only a part of the pain, pleasure and satisfactions of life are to be found in material things. They sought to protect Americans in their beliefs, their thoughts, their emotions and their sensations. They conferred, as against the Government, the right to be let alone—the most comprehensive of rights and the right most valued by civilized men. To protect that right, every unjustifiable intrusion by the Government upon the privacy of the individual, whatever the means employed, must be deemed a violation of the Fourth Amendment. And the use, as evidence in a criminal proceeding, of facts ascertained by such intrusion must be deemed a violation of the Fifth.
