 And in "Florida v. Royer", , the Court had remarked that the police could approach a suspect in a public place (there, an airport concourse) and ask him a few questions without violating the Fourth Amendment.The question in "Bostick" was whether the fact that the police approached the defendant while he was a passenger on a bus, by itself, rendered the encounter "unreasonable" under the Fourth Amendment.Justice O'Connor held it did not.