Maryland v. Dyson

In this case, the Maryland Court of Special Appeals held that the Fourth Amendment requires police to obtain a search warrant before searching a vehicle which they have probable cause to believe contains illegal drugs. Because this holding rests upon an incorrect interpretation of the automobile exception to the Fourth Amendment’s warrant requirement, we grant the petition for certiorari and reverse.

At 11 a.m. on the morning of July 2, 1996, a St. Mary’s County (Maryland) Sheriff’s Deputy received a tip from a reliable confidential informant that respondent had gone to New York to buy drugs,…