Whether the Fourth Amendment bars the warrantless seizure of incriminating evidence in plain view when police anticipated finding the evidence and intended to seize it.
Holding
No. Inadvertent discovery is not a necessary condition for a valid plain-view seizure.
Reasoning
The Court began by separating searches from seizures. A search ordinarily invades privacy, while a seizure interferes with a person's possessory interest in property. Seeing an item that is already exposed to an officer's view ordinarily does not invade privacy; taking the item does interfere with possession. Thus, the plain-view doctrine principally explains when an officer may seize an item without obtaining a separate warrant for it.
A valid plain-view seizure still has important limits. The officer must be lawfully present at the place from which the item is viewed, the item's incriminating character must be immediately apparent—meaning the officer has probable cause to associate it with criminal activity—and the officer must have a lawful right of access to the item itself. These requirements ensured that the officer's presence, observation, and seizure in Horton's home were constitutionally justified.
Although Justice Stewart's plurality opinion in Coolidge had proposed an inadvertence requirement, that portion of the opinion did not command a majority and was therefore not binding precedent. Moreover, Coolidge itself could be explained by the officers' lack of lawful authority to seize the automobiles, rather than by the anticipated nature of the discovery.
The Court rejected a subjective rule that would make validity turn on an officer's expectations or intentions. If officers are conducting a search within the area and duration authorized by a valid warrant or a recognized warrant exception, their prior interest in finding a particular item does not make its seizure unconstitutional once it is plainly seen and its criminal character is immediately apparent.
The Fourth Amendment's particularity requirement and the limits on the scope of a lawful search, rather than an inadvertence rule, prevent general exploratory searches. A warrant for particular objects permits officers to search only locations where those objects could reasonably be found, and the search must end when its lawful object is completed. Here, omitting the weapons from the warrant did not expand the search for the stolen rings; the officer encountered the weapons while conducting that authorized search.
Because the officer was lawfully searching Horton's residence under a valid warrant, had lawful access to the items, and had probable cause to recognize the weapons and related items as evidence of the robbery, their seizure was valid despite the officer's expectation that he might find them.