Geofence and Reverse-Keyword Warrants After the Chatrie Ruling: Where the Legal Ground Stands
The Supreme Court resolved the geofence circuit split in June 2026. Here's what Chatrie actually held, and what it left open for reverse-keyword warrants.
By IPA-IAC · 5 min · 20 October 2026
The question of whether geofence warrants are constitutional is no longer pending. On June 29, 2026, the Supreme Court decided Chatrie v. United States, resolving a circuit split that had left agencies in the Fourth and Fifth Circuits operating under contradictory rules for nearly two years. Agencies still planning around “the circuit split” or “the cert petition” are working from an outdated picture — the ruling is in, and it changes the compliance question from whether geofence requests are searches to how narrowly drawn they have to be.
How the Split Happened
Geofence warrants compel a provider — almost always Google — to disclose location data for every device that entered a defined area during a defined window, then let investigators narrow that pool down to identified suspects. In August 2024, the Fifth Circuit ruled in United States v. Smith that geofence warrants are unconstitutional as a category, calling them “modern-day general warrants” because they authorize searching everyone in an area rather than a particular person or place. The Fourth Circuit reached the opposite conclusion in United States v. Chatrie, first in a divided panel and then, on rehearing en banc, in a fractured 7–7 vote that left the underlying constitutional question — whether accessing this data is a “search” at all — formally unresolved in that circuit even as Chatrie’s own conviction was affirmed.
That left agencies with genuinely different legal exposure depending on which circuit they operated in, which is the kind of instability that draws Supreme Court review.
What Chatrie Actually Decided
The Court granted certiorari on January 16, 2026, heard argument April 27, 2026, and issued its decision June 29, 2026. In a 6–3 opinion written by Justice Kagan and joined by Chief Justice Roberts and Justices Sotomayor, Kavanaugh, and Jackson, the Court held that law enforcement conducts a Fourth Amendment search when it obtains an individual’s location history through a geofence request — even for a limited time and even though the data comes from a third party rather than the person directly. Justice Gorsuch joined the outcome through a separate concurrence grounded in property-law reasoning rather than the majority’s privacy-expectation framework, per SCOTUSblog’s case coverage. Justice Alito dissented, joined by Justices Thomas and Barrett.
What the Court did not decide is whether the specific warrant in Chatrie’s case satisfied the Fourth Amendment’s particularity and probable-cause requirements — that question was remanded to the Fourth Circuit. So the practical rule going forward is narrower than “geofence warrants are banned” and narrower than “geofence warrants are fine”: accessing this data is definitively a search requiring a valid warrant, but how specific that warrant must be about geographic scope, time window, and named subjects is still being worked out on remand.
Correction to the premise: this topic is often framed as still awaiting a cert decision as of late 2026. That framing is out of date. Cert was granted in January 2026 and the case was fully decided in June 2026 — agencies should treat the search question as settled and the particularity question as the open one.
Reverse-Keyword Warrants Sit in the Same Category, With Less Resolution
Reverse-keyword warrants — compelling a provider to identify every account that searched a specific term during a specific window — work on the same backwards logic as geofence warrants: start with facts about the crime, then ask a provider to identify a pool of possible suspects rather than starting from a named person. The Congressional Research Service’s 2026 report on reverse warrants treats geofence and keyword warrants as the same doctrinal family for exactly this reason, and Chatrie’s “accessing this data is a search” holding logically extends to keyword requests, but the Supreme Court did not rule on a keyword-warrant case directly. State courts have issued scattered opinions on keyword warrants, and legislative action is moving faster than adjudication: Delaware’s legislature took up a bill sharply restricting reverse-keyword warrants within a day of the Chatrie decision, an early sign that states are treating the ruling as license to legislate ahead of further litigation.
Google’s Own Changes Compound the Legal Shift
Independent of the litigation, Google began shifting Location History storage to be on-device by default in 2024, encrypting what remains in the cloud so the company itself cannot access it on request. That change reduces the pool of data available to compel in the first place, regardless of how courts eventually resolve particularity standards — a geofence warrant is only as useful as what the provider can actually produce.
What This Means for Agencies Now
Treat every geofence or reverse-keyword request as requiring a warrant supported by particularized probable cause — not a broader administrative subpoena or a request modeled on pre-Chatrie templates. Narrow the geographic radius and time window to what the specific investigation actually justifies, since particularity is exactly what’s being litigated on remand and overly broad requests are the ones most likely to fail under whatever standard the Fourth Circuit ultimately sets. Route any reverse-keyword request through legal counsel before submission, given that state legislatures are actively restricting the practice in the ruling’s immediate aftermath. And build in the expectation that provider compliance will keep shrinking as Google’s storage changes take full effect — a legal green light doesn’t guarantee the data is still there to request.
One practical wrinkle carries over from the pre-Chatrie cases: both the Fifth Circuit in Smith and the district court in Chatrie found Fourth Amendment problems with the warrants at issue but still let the resulting evidence stand under the good-faith exception, because officers had relied on a warrant a magistrate had actually signed. That exception protects past investigations built on templates agencies believed were sound — it does not protect new requests submitted after June 29, 2026, when the search question is no longer unsettled. An agency that keeps using a pre-Chatrie template now, aware that the underlying legal theory has been substantially narrowed, is building a weaker good-faith argument than the one that carried Smith and Chatrie’s own cases through appeal.