The Geofence Remand: How SCOTUS Just Opened a New Front in Fourth Amendment Litigation

The Unfinished Business of Digital Surveillance

The Supreme Court's June 2026 decision in Chatrie v. United States answered one monumental question while deliberately leaving another unresolved—a judicial maneuver that has now triggered a wave of remands forcing lower courts to confront the constitutionality of geofence warrants without clear guidance from the justices. Reuters reports that the Court has ordered reconsideration of at least one geofence warrant case in light of Chatrie's holding that accessing historical cell-phone location data constitutes a Fourth Amendment search. But the Court pointedly declined to resolve whether geofence warrants—which compel providers like Google to identify all devices within a specified area during a particular timeframe—violate the Fourth Amendment's prohibition on general warrants.

This is not judicial modesty. It's strategic ambiguity. And for criminal defense practitioners, it represents both an opportunity and a minefield.

Why the Remand Matters More Than the Headline

On the surface, a remand order might seem like procedural housekeeping. But in the Fourth Amendment context, it signals something far more consequential: the Court is unwilling to issue a categorical rule on geofence warrants, preferring instead to let the issue percolate through the circuits. That means defense counsel now face a fractured landscape where the constitutionality of a geofence warrant may depend on which federal circuit issued it, how the warrant was drafted, and whether the trial court applied pre-Chatrie or post-Chatrie Fourth Amendment analysis.

The stakes are enormous. Geofence warrants invert the traditional warrant process. Instead of identifying a suspect and then seeking location data, law enforcement identifies a location and time, then sweeps up data on every device in that area—potentially hundreds or thousands of innocent people—before narrowing to a suspect. The Fourth Amendment's particularity requirement, enshrined in the Warrant Clause, exists precisely to prevent such general searches. See U.S. Const. amend. IV (requiring warrants to "particularly describ[e] the place to be searched, and the persons or things to be seized").

By holding in Chatrie that accessing historical location data is a search under the Fourth Amendment, the Court extended the logic of Carpenter v. United States, 585 U.S. 296 (2018), which held that the government needs a warrant to access cell-site location information. But Carpenter involved targeted surveillance of a known suspect. Geofence warrants are categorically different: they are dragnets, plain and simple.

The General Warrant Problem

The Framers wrote the Fourth Amendment in direct response to the British Crown's use of general warrants and writs of assistance, which allowed officials to rummage through homes and papers without specific cause. See Riley v. California, 573 U.S. 373, 403 (2014) (recognizing the Fourth Amendment was a response to "reviled 'general warrants'"). A geofence warrant is the digital equivalent: it authorizes the government to search the location data of every person in a defined area, most of whom have no connection to any crime.

Yet the Supreme Court's remand order suggests the justices are not prepared to say so—at least not yet. This creates an immediate practical problem for defense attorneys: how do you challenge a geofence warrant when the Supreme Court has acknowledged the Fourth Amendment is implicated but refused to say it's violated?

Strategic Implications for Defense Counsel

The answer lies in the remand itself. By sending geofence cases back to lower courts for reconsideration in light of Chatrie, the Court is effectively inviting defense challenges that emphasize the warrant's lack of particularity. Counsel should argue that even if accessing location data requires a warrant under Carpenter and Chatrie, a warrant that fails to identify a specific suspect or device does not satisfy the Fourth Amendment's particularity requirement.

This argument has traction. The Fourth Circuit, in United States v. Chatrie, 590 F. Supp. 3d 901 (E.D. Va. 2022), initially upheld a geofence warrant but acknowledged the "novel" constitutional questions. Other courts have been more skeptical. The Northern District of California suppressed evidence obtained via geofence warrant in In re Search of Info. Stored at Premises Controlled by Google, 481 F. Supp. 3d 730 (N.D. Cal. 2020), finding the warrant lacked probable cause as to every person whose data was seized.

Post-Chatrie, defense counsel should file motions to suppress arguing that geofence warrants are per se unconstitutional general warrants. Even if the trial court denies the motion, the argument preserves the issue for appeal—and the Supreme Court's remand order signals that at least some justices are open to the argument.

The Prosecutorial Dilemma

For prosecutors, the remand creates uncertainty. Geofence warrants have become a critical tool in investigations where traditional leads have run cold—property crimes, arsons, and even homicides. But if the Supreme Court ultimately rules that geofence warrants are unconstitutional, every conviction obtained using such evidence could be vulnerable to collateral attack.

The prudent course for prosecutors is to treat geofence evidence as presumptively suppressible and build cases using traditional investigative methods wherever possible. If a geofence warrant is necessary, prosecutors should narrow the geographic and temporal scope as much as possible and be prepared to justify why the warrant is not a forbidden general search.

The Road Ahead

The Supreme Court's remand order is not a punt—it's an invitation. The justices are watching how lower courts handle geofence challenges post-Chatrie, and the issue will almost certainly return to the high court within the next two terms. In the meantime, criminal practitioners on both sides must navigate a legal landscape where the Fourth Amendment clearly applies to geofence warrants, but whether it forbids them remains an open question.

For defense counsel, the message is clear: challenge every geofence warrant. The Supreme Court has given you the tools. Now use them.