The Supreme Court ruled 6-3 in Chatrie v. United States that police conducting a geofence search, ordering Google to sweep location data on all users near a crime scene, constitutes a Fourth Amendment search requiring constitutional justification.
The Court's 6-3 decision in Chatrie v. United States confirms what cypherpunks have known for decades: your location data is yours, and the government needs a real warrant to take it.
Key takeaways
The Supreme Court ruled today in Chatrie v. United States, No. 25-112, that law enforcement conducting a geofence search of Google's location data performs a Fourth Amendment search, meaning it requires constitutional justification. Writing for a five-justice majority, Justice Elena Kagan held that individuals retain a reasonable expectation of privacy in records about their cell phone's location, full stop, even when those records are held by a third-party tech company.
The decision is the first digital surveillance ruling from the Court since Carpenter v. United States, 585 U.S. 296 (2018), and the vote was 6-3 on the result, with deeper fractures on the legal reasoning: 5-1-3 on the majority's privacy-expectation framework, with Justice Gorsuch concurring in the judgment on property-rights grounds. Justice Alito dissented, joined as to Part I by Justice Thomas and joined as to Parts II-B, II-C-1, and II-C-2 by Justice Barrett, who also filed a separate dissent.
The underlying facts: on May 20, 2019, someone robbed a credit union in Midlothian, Virginia. Police obtained a geofence warrant compelling Google to search the location histories of all its users, scanning for any device within a 150-meter radius of the scene. Google records location approximately every two minutes. That sweep initially yielded 19 anonymized users; police narrowed the list to 9, then de-anonymized 3, including Okello Chatrie, who was ultimately charged.
The majority opinion put it plainly. Kagan wrote:
"An individual has a reasonable expectation of privacy in records about his cell phone's location, and police intrude on that constitutionally protected interest when they demand the information, even though for only a limited time, and from a third-party tech company."
That last clause is doing significant work. The government's core argument was the third-party doctrine: you shared the data with Google voluntarily, so you have no protected privacy interest in it. The Court rejected that framing for location data, building on Carpenter's logic that prolonged location surveillance reveals "a wealth of detail about a person's familial, political, professional, religious, and sexual associations." The majority said shorter-duration surveillance can do the same.
Gorsuch concurred in the judgment but would have gone further and gotten there differently:
"As I see it, Mr. Chatrie's Location History data qualifies as his personal property."
That is not a trivial distinction. The privacy-expectation test is inherently malleable, courts can always argue expectations have shifted. A property-rights frame is harder to erode: it's yours, and the government taking it without a warrant is a seizure. Alito dissented sharply, writing that "The Court's decision to intervene in this matter represents an irresponsible escapade that upends Fourth Amendment law without providing any clear certainty to law enforcement or the public." (Chatrie v. United States, slip op.)
Carpenter cracked the third-party doctrine for prolonged cell-site location data. Chatrie cracks it for shorter-duration geofence sweeps. The trajectory is clear. But the ruling comes with significant carve-outs that matter.
First, the Court explicitly did not categorically ban geofence warrants. The Fifth Circuit, in United States v. Smith, 110 F.4th 817 (5th Cir. 2024), had already gone that far, calling them categorically prohibited by the Fourth Amendment. SCOTUS declined to adopt that position. Instead, the ruling means geofence warrants are searches that require probable cause and particularity, whether any given warrant satisfies those standards goes back to the Fourth Circuit to decide for this case.
Second, and more practically: Google has already made this specific fight largely moot. The company announced changes to its location data storage in 2023 that have made mass geofence searches of its users' data impossible, with the changes rolling out through 2024 and into 2025. But Google is not the only collector of location data, and law enforcement has routinely purchased equivalent data commercially from data brokers, sidestepping the warrant requirement entirely because no "search" occurs when the government buys publicly available data. That pipeline is untouched by this ruling. Watch for the next fight there.
The implications for financial surveillance are worth watching closely. Gorsuch's property-rights concurrence, your data is your property, not merely something you have a reasonable expectation in, has a logical endpoint beyond location data. If location records held by a third party are your property under the Fourth Amendment, the same argument eventually reaches financial transaction records held by a custodian. For Bitcoiners, that vector runs directly toward the question of whether an exchange handing metadata or transaction records to the government without a particularized warrant is itself a Fourth Amendment violation. That is not settled law today. But the direction Gorsuch is pointing is unmistakable. It matters whether his property framing picks up votes in future cases.
The deeper point is one the AI surveillance machine built into KYC infrastructure and the Flock Safety ALPR network feeding law enforcement databases make vivid: the problem is not just geofence warrants. It's that an enormous surveillance apparatus has been constructed on top of third-party data collection, and the Fourth Amendment floor the Court just raised covers one narrow category of it. The protocol-level answer, running your own node, holding your own keys, communicating over Nostr, never giving the data to a third party in the first place, has always been the more durable solution.
The Fourth Circuit now has to answer whether the Chatrie warrant specifically was reasonable given what the Court just established, and that answer will shape how lower courts evaluate the thousands of geofence warrants issued before Google's 2023 policy changes. Congress is the other front: legislation explicitly carving out law-enforcement access to aggregated location data from data brokers would route around today's ruling entirely, and the Court would have to decide whether to extend Chatrie's logic to that context. If that carve-out passes and the Court upholds it, today's ruling's practical effect narrows considerably. The data-broker loophole is where the next legal and legislative battle lands.
No. The Court held that executing a geofence warrant is a Fourth Amendment search, meaning it requires probable cause and particularity. Whether any specific warrant satisfies those requirements is a separate question. The Fifth Circuit had already ruled geofence warrants categorically prohibited; SCOTUS declined to go that far. The Chatrie warrant itself was sent back to the Fourth Circuit for that determination.
Not directly. Chatrie is about cell-phone location data held by Google. But the legal reasoning matters: the Court rejected the argument that sharing data with a third party strips you of all constitutional protection in it. Justice Gorsuch's concurrence frames that data as personal property. If that property logic extends to financial records held by exchanges or custodians, it could constrain warrantless government demands. That is not settled. The safest answer for now: hold your own keys and minimize custodial exposure.
Yes, for now. Chatrie addressed a warrant directed at Google. Law enforcement has routinely purchased equivalent location data from commercial data brokers without obtaining a warrant, on the theory that buying publicly available data is not a Fourth Amendment search. That loophole is entirely untouched by today's ruling and is the most consequential open front for the next legal fight.
