Syllabus
(ii) The scope of the privacy interests at stake is further complicated by the fact that the data viewed on many modern cell phones may in fact be stored on a remote server. Thus, a search may extend well beyond papers and effects in the physical proximity of an arrestee, a concern that the United States recognizes but cannot definitively foreclose. Pp. 21-22.
(c) Fallback options offered by the United States and California are flawed and contravene this Court's general preference to provide clear guidance to law enforcement through categorical rules. See Michigan v. Summers, 452 U. S. 692, 705, n. 19. One possible rule is to import the Gant standard from the vehicle context and allow a warrantless search of an arrestee's cell phone whenever it is reasonable to believe that the phone contains evidence of the crime of arrest. That proposal is not appropriate in this context, and would prove no practical limit at all when it comes to cell phone searches. Another possible rule is to restrict the scope of a cell phone search to information relevant to the crime, the arrestee's identity, or officer safety. That proposal would again impose few meaningful constraints on officers. Finally, California suggests an analogue rule, under which officers could search cell phone data if they could have obtained the same information from a pre-digital counterpart. That proposal would allow law enforcement to search a broad range of items contained on a phone even though people would be unlikely to carry such a variety of information in physical form, and would launch courts on a difficult line-drawing expedition to determine which digital files are comparable to physical records. Pp. 22-25.
(d) It is true that this decision will have some impact on the ability of law enforcement to combat crime. But the Court's holding is not that the information on a cell phone is immune from search; it is that a warrant is generally required before a search. The warrant requirement is an important component of the Court's Fourth Amendment jurisprudence, and warrants may be obtained with increasing efficiency. In addition, although the search incident to arrest exception does not apply to cell phones, the continued availability of the exigent circumstances exception may give law enforcement a justification for a warrantless search in particular cases. Pp. 25-27.
No. 13-132, reversed and remanded; No. 13-212, 728 F. 3d 1, affirmed.
Roberts, C. J., delivered the opinion of the Court, in which Scalia, Kennedy, Thomas, Ginsburg, Breyer, Sotomayor, and Kagan, JJ., joined. Alito, J., filed an opinion concurring in part and concurring in the judgment.
