Chatrie v. United States · ¶33

We granted certiorari solely on the question whether the police violated the Fourth Amendment in obtaining Chatrie’s location data, thus declining to consider the exclusionary rule issue. See 607 U. S. 1148 (2026). The disputed Fourth Amendment question divides into two parts. First, did law enforcement officials conduct a search under the Fourth Amendment when they acquired Chatrie’s location data from Google? We hold that they did because an individual has a legitimate expectation of privacy in his cellphone location data. Second, did the multi-step geofence warrant issued here make that search reasonable? We leave that question—which requires deciding whether the warrant satisfied the Fourth Amendment’s probable cause and particularity requirements at each stage of the search process—to the Court of Appeals to address in the first instance.

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