The Supreme Court ruled 6-3 on Sunday that law enforcement must obtain a warrant before demanding the cell phone location data of every person in a geographic area, a landmark decision that extends Fourth Amendment protections into the era of mass digital surveillance.
The ruling in Chatrie v. United States is the most significant expansion of digital privacy rights since the court’s 2018 Carpenter decision, and it lands at a moment when the government’s appetite for warrantless data collection has never been higher.
What Geofence Warrants Actually Do
A geofence warrant is not a conventional search. Instead of identifying a suspect and then seeking evidence, it works in reverse: police draw a virtual boundary around a location and time, then demand that a tech company hand over the identity and movements of every device that passed through. In the case that reached the justices, NBC News reported that the FBI drew a 150-meter circle around a bank in Richmond, Virginia, after a 2019 robbery and obtained from Google the location records of every phone inside it. Okello Chatrie was identified, prosecuted, and convicted partly on that data.
The constitutional problem is obvious once you see it: the government was searching everyone in the neighborhood to find one suspect. That is, by definition, a general warrant, the exact abuse the Fourth Amendment was written to prevent.
What the Court Actually Held
Justice Elena Kagan, writing for the majority joined by Chief Justice Roberts and Justices Sotomayor, Gorsuch, Kavanaugh, and Jackson, held that an individual has “a reasonable expectation of privacy in records about his cell phone’s location.” As SCOTUSblog detailed, the court ruled that a geofence demand constitutes a “search” under the Fourth Amendment because the ubiquity of modern smartphones means location data reveals the intimate details of a person’s life: where they worship, who they associate with, what medical providers they visit.
Kagan’s opinion drew an explicit parallel to emails, photographs, and personal documents, materials the government has long needed a warrant to access. The logic extends Carpenter v. United States, the 2018 ruling that required warrants for historical cell-site location information, to the next frontier: real-time geographic dragnet searches.
The court did not, however, resolve the specific case. It sent Chatrie back to the lower court to determine whether the particular warrant the FBI obtained met the new standard, a move that will generate years of litigation over what “narrowly tailored” means in practice.
The Dissent and What It Reveals
Justices Alito, Thomas, and Barrett dissented. As ABC News reported, the dissenters argued that location data held by a third-party company like Google does not carry a reasonable expectation of privacy, a position rooted in the “third-party doctrine” that the majority has now decisively weakened for digital-age records. The 6-3 split is notable because it crossed the court’s usual ideological lines: Gorsuch and Kavanaugh joined the liberal justices and Roberts, while Barrett sided with the court’s most conservative members.
Why This Matters Beyond One Bank Robbery
The structural why here is not about Okello Chatrie’s conviction. It is about whether the constitutional framework can keep pace with the government’s ability to turn the smartphone in your pocket into a tracking device. Google processed as TechCrunch documented more than 11,000 geofence requests in 2020 alone, a number that had been growing rapidly. Although Google announced in 2023 that it would stop centrally storing location data (moving it to individual devices), other companies and future technologies remain subject to the same government demands.
The ruling arrives on the same day the court handed down the Slaughter decision expanding presidential control over independent agencies, making the geofence ruling a rare counter-current: one decision expanding executive power, another constraining law enforcement’s ability to surveil without judicial oversight.
Civil liberties organizations including the ACLU, Electronic Frontier Foundation, and the Brennan Center praised the decision as a generational privacy win. Law enforcement groups countered that geofence warrants have been instrumental in solving violent crimes, kidnappings, and terrorism cases, and warned that the warrant requirement could slow investigations at critical moments.
What Happens Next
The practical impact will depend on how lower courts define “narrowly tailored.” A warrant that targets a single building during a 30-minute window will almost certainly survive; one that sweeps an entire city block for 24 hours almost certainly will not. The gray zone between those extremes will be litigated for years.
For the average American, the message is simpler: the Supreme Court has recognized that where your phone goes is where you go, and the government cannot treat that information as freely available just because a tech company happens to hold it. In an era when opting out of carrying a trackable device is functionally impossible, that is a constitutional line worth drawing.