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US Supreme Court rules geofence warrants are a Fourth Amendment 'search,' limits police access to Google location data

A 6-3 majority held in United States v. Chatrie that law enforcement's demand for cell-phone location records from a tech company constitutes a constitutional search, requiring a warrant meeting probable-cause standards; the case is remanded to lower courts.

Courts·AI· landmark Who Decides·What Broke ·5 takes ·

Summary

The United States Supreme Court held 6-3 on Monday that a "geofence warrant," used by police to compel Google to disclose location data for every mobile device near the scene of a crime, constitutes a "search" under the Fourth Amendment. Justice Elena Kagan wrote for the majority in United States v. Chatrie, a case stemming from the 2019 armed robbery of a Virginia credit union in which investigators used a Google court order to identify Okello Chatrie. The majority held that individuals retain a reasonable expectation of privacy in their cell-phone location records even though those records are held by a third-party tech company, partially narrowing the third-party doctrine established in the 1970s. Chatrie's conviction is remanded to the Fourth Circuit; the Supreme Court declined to decide whether the specific search in his case was reasonable, leaving that question for lower courts. Justices Alito, Thomas, and Barrett dissented.

The split

The ruling represents a rare cross-ideological coalition: the 6-3 majority included both liberal and conservative justices. The dissent, led by Alito, argued that the third-party doctrine should apply in full because Chatrie voluntarily shared his location with Google. Fourth Amendment advocates and digital-rights groups called the ruling a "watershed"; law enforcement associations warned it could impede investigations and require police to establish individualised probable cause before they can even identify who to suspect.

By the numbers

  • 195,000, dollars stolen in the 2019 Midlothian, Virginia credit union robbery that triggered the case
  • Nearly 12, years of Chatrie's prison sentence, which may now be revisited
  • 6-3, the ruling margin, with Kagan writing for a cross-ideological majority
  • Hundreds, of thousands of geofence warrant demands sent to Google since 2018, the scale now in legal doubt

Why it matters

Geofence warrants have become one of law enforcement's most widely used digital investigative tools, with Google alone receiving roughly 60,000 such requests in recent years. The ruling does not ban geofence warrants outright but requires courts to treat them as searches subject to the Fourth Amendment's warrant requirement, raising the procedural bar. It also further erodes the third-party doctrine in the context of location data, building on Carpenter v. United States (2018). For Google and other tech companies, the ruling clarifies that compliance with geofence warrants exposes user data to constitutional scrutiny, strengthening arguments for narrow compliance.

What to watch

  • Fourth Circuit ruling on remand: whether Chatrie's specific geofence search was a constitutionally valid search.
  • Congressional response: whether legislators try to codify or broaden the ruling.
  • How police departments adjust investigative protocols for location data.
  • Other tech companies (Apple, Meta, Snapchat) re-evaluating geofence-warrant policies in light of the ruling.