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The U.S. Supreme Court on Monday heard oral arguments in Chatrie v. United States, a high-stakes case that could reshape Fourth Amendment protections in the digital age and determine the future of controversial “geofence” search warrants used by law enforcement.

Geofence warrants allow police and federal agents to compel companies like Google to disclose location data for all users present in a designated geographic area during a specific time window. Investigators use the tool to identify potential suspects by sifting through vast troves of smartphone location information, effectively searching first and developing probable cause later.

Civil liberties groups argue the practice is inherently overbroad and violates constitutional safeguards against unreasonable searches. Critics point to instances where innocent bystanders, protest attendees, and unrelated individuals have had their data swept up, sometimes due to warrants that extended far beyond the crime scene, reported Tech Crunch.

The case stems from the 2019 armed robbery of a bank in Virginia. Surveillance footage showed a suspect using a cellphone. Police obtained a geofence warrant from Google, requesting anonymized location data for devices within a small radius of the bank around the time of the crime. Google initially provided data for multiple accounts. Investigators then sought identifying information for a subset of users, including Okello Chatrie, who was later linked to the scene, arrested, and sentenced to more than 11 years in prison after pleading guilty.

Chatrie’s legal team challenged the warrant, contending it lacked sufficient probable cause tying him—or any specific account—to the robbery. Lower courts split on the issue, with one ruling the warrant failed to meet constitutional standards but ultimately allowing the evidence under the “good faith” exception. Chatrie’s appeal argues the warrant unconstitutionally permitted a broad search of hundreds of millions of Google users’ data.

“Search First and Develop Suspicions Later”

During Monday’s arguments, the justices appeared divided. Some expressed concern over the sweeping nature of geofence requests, while others weighed law enforcement’s need for modern investigative tools against privacy expectations.

Legal observers noted the court is unlikely to issue a blanket ban. Orin Kerr, a University of California, Berkeley law professor specializing in the Fourth Amendment, predicted the justices would likely uphold geofence warrants if properly limited in scope. Techdirt writer and attorney Cathy Gellis suggested the decision may involve incremental restrictions rather than sweeping new rules.

A coalition of security researchers and technologists filed an influential amicus brief arguing that forcing Google to actively search individual user accounts for police violates the Fourth Amendment. The government countered that users like Chatrie voluntarily shared their location data with Google, and the warrant merely directed the company to produce relevant records.

Surge in Use and Tech Industry Shifts

Federal and local law enforcement have increasingly relied on geofence warrants since their first documented federal use in 2016. By 2018, agencies were filing thousands annually, according to a New York Times investigation. The warrants represent a significant portion of demands received by tech companies holding location data from maps, searches, and mobile devices.

Google has since changed its practices, moving location history to users’ devices rather than central servers and reportedly ceasing responses to geofence warrants in 2025. Other companies—including Microsoft, Yahoo, Uber, and Snap—continue to receive and respond to such requests.

The Supreme Court’s eventual ruling, expected later this year, could set nationwide standards for digital location privacy. While the decision will not affect Chatrie’s conviction, it carries broad implications for how law enforcement accesses location data from any company that stores it on its servers.

The case marks one of the first major Fourth Amendment disputes involving modern surveillance technology to reach the nation’s highest court this decade.

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