The Fourth Amendment does not require police officers to inform a motorist at the end of a traffic stop that they are free to go before seeking permission to search the motorist's car. Decided November 18, 1996 (argued October 8, 1996). Opinion of the Court: William Rehnquist → go there Dissenting: Stevens. Applied: the Fourth Amendment → go there Topic: Fourth Amendment rights. Ohio v. Robinette, 519 U.S. 33 (1996), was a United States Supreme Court case in which the Court held that the Fourth Amendment does not require police officers to inform a motorist at the end of a traffic stop that they are free to go before seeking permission to search the motorist's car. Wiki link