Bond v. United States, 529 U.S. 334, 4 (2000)

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Cite as: 529 U. S. 334 (2000)

Opinion of the Court

Place, 462 U. S. 696, 707 (1983). Indeed, it is undisputed here that petitioner possessed a privacy interest in his bag.

But the Government asserts that by exposing his bag to the public, petitioner lost a reasonable expectation that his bag would not be physically manipulated. The Government relies on our decisions in California v. Ciraolo, supra, and Florida v. Riley, 488 U. S. 445 (1989), for the proposition that matters open to public observation are not protected by the Fourth Amendment. In Ciraolo, we held that police observation of a backyard from a plane flying at an altitude of 1,000 feet did not violate a reasonable expectation of privacy. Similarly, in Riley, we relied on Ciraolo to hold that police observation of a greenhouse in a home's curtilage from a helicopter passing at an altitude of 400 feet did not violate the Fourth Amendment. We reasoned that the property was "not necessarily protected from inspection that involves no physical invasion," and determined that because any member of the public could have lawfully observed the defendants' property by flying overhead, the defendants' expectation of privacy was "not reasonable and not one 'that society is prepared to honor.' " See Riley, supra, at 449 (explaining and relying on Ciraolo's reasoning).

But Ciraolo and Riley are different from this case because they involved only visual, as opposed to tactile, observation. Physically invasive inspection is simply more intrusive than purely visual inspection. For example, in Terry v. Ohio, 392 U. S. 1, 16-17 (1968), we stated that a "careful [tactile] exploration of the outer surfaces of a person's clothing all over his or her body" is a "serious intrusion upon the sanctity of the person, which may inflict great indignity and arouse strong resentment, and it is not to be undertaken lightly." Although Agent Cantu did not "frisk" petitioner's person, he did conduct a probing tactile examination of petitioner's carry-on luggage. Obviously, petitioner's bag was not part of his person. But travelers are particularly concerned

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