Supreme Court likely to let police use geofence warrants to identify criminal suspects

Supreme Court Signals Support for Police Use of Geofence Warrants in Criminal Investigations

The Supreme Court appeared inclined to support the constitutionality of geofence warrants during oral arguments Monday, potentially allowing law enforcement to continue using this powerful digital surveillance tool that collects location data from cellphones near crime scenes.

During nearly two hours of arguments, the justices considered an appeal from Okello Chatrie, who is currently serving a prison sentence after pleading guilty to robbing a bank in suburban Richmond, Virginia. Chatrie initially evaded capture until investigators deployed a geofence warrant, which created a virtual perimeter around the bank and revealed which mobile devices were in the vicinity during the May 2019 robbery.

Several justices seemed skeptical of arguments presented by Chatrie’s attorney, Adam Unikowsky, who contended that such warrants are too broad to satisfy Fourth Amendment requirements prohibiting unreasonable searches. Justice Sonia Sotomayor specifically pushed back against this characterization, noting, “This isn’t that. It identifies a place, a crime, a timeframe.”

The case highlights a growing split among federal courts regarding the constitutionality of this surveillance technique. While the federal appeals court in Richmond upheld Chatrie’s conviction, the federal appeals court in New Orleans ruled in a separate case that geofence warrants represent “general warrants categorically prohibited by the Fourth Amendment.”

This divergence in judicial interpretation has created uncertainty for both law enforcement agencies and privacy advocates across the country. Technology companies like Google, which process thousands of geofence warrants annually, have also been caught in the middle of this constitutional debate.

The Supreme Court’s eventual ruling could have significant implications for digital privacy in the United States. Legal experts note that geofence warrants represent one of the most sweeping surveillance tools available to modern law enforcement, potentially capturing data from dozens or even hundreds of innocent individuals who happen to be near a crime scene.

Throughout the arguments, the justices appeared to favor a narrow ruling rather than a sweeping decision on digital privacy. They explored options including placing limits on the geographic scope and time parameters of such warrants, or potentially avoiding the direct question of whether geofence surveillance constitutes a “search” requiring a warrant under the Fourth Amendment.

Instead, the Court may simply rule that, assuming a warrant is required, geofence searches conducted with proper judicial authorization are constitutionally permissible.

This case joins a series of Supreme Court decisions grappling with how constitutional protections written in the 18th century apply to 21st-century technology. In recent years, the Court has addressed law enforcement access to cell phone location records, GPS tracking, and thermal imaging technology.

Privacy advocates have expressed concern that geofence warrants represent a dangerous expansion of police surveillance capabilities. Unlike traditional warrants that identify specific suspects before data collection, geofence warrants work in reverse—gathering data on everyone in an area to identify possible suspects afterward.

Law enforcement officials, meanwhile, argue that such tools are crucial for solving crimes in an era when physical evidence is increasingly replaced by digital footprints. They contend that appropriate judicial oversight and narrowly tailored warrants provide sufficient constitutional safeguards.

Even if the Court sides with Chatrie on constitutional grounds, it may not affect his personal case. The federal judge who initially ruled that the search violated Chatrie’s rights still allowed the evidence under the “good faith exception,” finding that the officer who applied for the warrant reasonably believed he was acting properly.

A decision in the case is expected by the end of the Court’s term in June.