Whether police who have probable cause to search an automobile for contraband may, without a warrant, open closed containers found within the vehicle that might conceal the object of the search.
Holding
Yes. When probable cause justifies the search of a lawfully stopped vehicle, it justifies the warrantless search of every part of the vehicle and its contents that may conceal the object of the search, including closed containers.
Reasoning
The automobile exception established in Carroll v. United States permits a warrantless vehicle search when officers have objective probable cause to believe the vehicle carries contraband. The exception reflects the practical difficulty of obtaining a warrant before a movable vehicle can leave the jurisdiction, while retaining the central requirement that probable cause—not an officer's unsupported good faith—must justify the intrusion.
The permissible scope of the search tracks the scope that a magistrate could authorize in a warrant. A warrant to search a car for a particular object would permit officers to inspect every area in which that object could reasonably be hidden, including the trunk, glove compartment, upholstery, and containers capable of holding it. Dispensing with prior judicial approval under the automobile exception does not narrow the places officers may search once probable cause to search the vehicle exists.
Carroll itself supported this conclusion because officers there opened parts of the car and tore into upholstery to find hidden liquor. The Court reasoned that it would be illogical to permit officers to search an automobile's concealed compartments but prohibit them from opening a bag or package found in those same areas. Earlier automobile-search cases also had sustained searches of packages and containers found during valid vehicle searches.
The rule turns on the object of the search and the places where there is probable cause to believe that object may be found, not on whether a particular container seems more or less deserving of privacy. Drawing constitutional lines between paper bags, suitcases, pouches, and other containers would be unprincipled and difficult to administer. A paper bag may conceal private effects no less than an expensive locked case.
The rule is limited by probable cause. Probable cause to find a stolen lawnmower in a garage does not authorize a search of an upstairs bedroom, and probable cause to find undocumented aliens in a van does not authorize opening a suitcase. Likewise, when police have probable cause directed only at a particular container, rather than the vehicle generally, that probable cause does not authorize a search of the entire vehicle.