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Last Update: 10/27/2026 at 6:00 AM EST
Geofence Warrants and the Fourth Amendment
Coverage from Reason, Truthout, and others
Geofence warrants ask technology companies to identify devices recorded within a specified area and time window, potentially bringing location data from uninvolved people into a police investigation.
In Chatrie v. United States, the Supreme Court treated police acquisition of cellphone location records as a Fourth Amendment search, even when the records are held by a third party, building on Carpenter v. United States. The case arose from a Virginia robbery investigation in which Google provided location data through narrowing stages. Questions about whether the warrant met probable-cause and particularity requirements remained for review, keeping the warrant’s scope and process central to the constitutional analysis.
Looking Back
224 Day Timeline
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All Articles56 articles
Important
Supreme Court ruling in Chatrie v. United States in 2024 treated geofence warrant access to Google location history as a Fourth Amendment search.
7/24/2026 • Data Collection & Surveillance Practices • General
Civil rights attorneys use the Supreme Court's Chatrie decision to support warrant-based challenges to automatic license plate readers used by police departments.
7/10/2026 • Data Collection & Surveillance Practices • General
In Chatrie v. United States, geofence warrants used after a 2019 Virginia bank robbery requested Google location data for devices detected in a defined area.
5/4/2026 • Data Collection & Surveillance Practices • General
After the Supreme Court ruling in Chatrie v United States, legal scholars said warrant requirements for location-history searches could affect law enforcement ALPR use.
7/10/2026 • Data Collection & Surveillance Practices • General
Supreme Court ruled in Chatrie v United States that police need a warrant to access historical cell phone location data used in geofence tracking.
7/2/2026 • Regulation, Law & Enforcement • General
On January 27, 2026, U.S. District Judge Mark Davis ruled in Norfolk, Virginia, that the citys Flock license plate camera network does not yet violate constitutional privacy rights.
2/11/2026 • Data Collection & Surveillance Practices • General
On June 29, 2026, the U.S. Supreme Court held in Washington that obtaining detailed Google Location History through a geofence warrant is a Fourth Amendment search.
9/22/2026 • Regulation, Law & Enforcement • General
The U.S. Supreme Court ruled in Chatrie that geofence warrants are Fourth Amendment searches, leaving lower courts to define permissible location-data requests.
9/1/2026 • Regulation, Law & Enforcement • General
The U.S. Supreme Court held in 2026 that police acquisition of Google geofence location data from a Virginia robbery investigation constituted a Fourth Amendment search.
8/25/2026 • Regulation, Law & Enforcement • General
The First Circuit ruled in 2026 that investigators could analyze Eric Robert Johnson's publicly exposed Freenet IP address without a warrant under the Fourth Amendment.
8/17/2026 • Regulation, Law & Enforcement • General
On June 29, 2026, the Supreme Court ruled in Chatrie v. United States that geofence warrants require Fourth Amendment warrants, while government purchases of brokered location data remain available nationwide.
8/4/2026 • Regulation, Law & Enforcement • General
On June 29, 2026, the U.S. Supreme Court ruled in Washington that geofence warrants are Fourth Amendment searches involving privately stored location data.
7/27/2026 • Regulation, Law & Enforcement • General
US Supreme Court in Chatrie v. United States ruled that police access to historical smartphone location history is a Fourth Amendment search requiring a warrant.
7/21/2026 • Regulation, Law & Enforcement • General
Schmidt and Arrington appealed a Norfolk warrantless license-plate reader decision after Chatrie strengthened Fourth Amendment scrutiny of location-data aggregation.
7/17/2026 • Regulation, Law & Enforcement • General
On June 29, 2026, the Supreme Court held in Chatrie v. United States that geofence warrants requiring Google to disclose historical cell-phone location data are Fourth Amendment searches.
7/16/2026 • Regulation, Law & Enforcement • General
On June 29, 2026, the U.S. Supreme Court ruled in Chatrie v. United States that police access to cellphone location data via Google geofence requests constitutes a Fourth Amendment search.
7/15/2026 • Regulation, Law & Enforcement • General
Supreme Court in Chatrie v. United States ruled geofence surveillance is a Fourth Amendment search requiring a warrant and strengthened protections for cellphone location tracking.
7/10/2026 • Regulation, Law & Enforcement • General
June 29, 2026 Supreme Court ruling in Chatrie v. United States held geofence warrants seeking Google Location History are Fourth Amendment searches.
7/10/2026 • Regulation, Law & Enforcement • General
In Chatrie v. United States, the Supreme Court ruled geofence warrants are Fourth Amendment searches, shaping New York’s ongoing disputes over location data surveillance.
7/7/2026 • Regulation, Law & Enforcement • General
Supreme Court in Chatrie v. United States held geofence warrants compelling Google Location History access are Fourth Amendment searches, remanding for probable cause and particularity.
7/7/2026 • Regulation, Law & Enforcement • General
The U.S. Supreme Court held in Chatrie v. United States that police obtain a Fourth Amendment search when accessing Google cell-phone location history.
7/6/2026 • Regulation, Law & Enforcement • General
Supreme Court ruled in Chatrie v U.S. that Fourth Amendment protections cover cell phone location data used in geofence warrant surveillance.
7/6/2026 • Regulation, Law & Enforcement • General
On June 29, 2026, the U.S. Supreme Court ruled in Chatrie v. United States that geofence warrants obtaining cell phone location data from a third party are Fourth Amendment searches.
7/2/2026 • Regulation, Law & Enforcement • General
In Chatrie v. United States, the U.S. Supreme Court ruled Monday that geofence warrants for cellphone location data are Fourth Amendment searches requiring probable cause, remanding the case for reasonableness review.
7/2/2026 • Regulation, Law & Enforcement • General
US Supreme Court in Chatrie v. United States ruled police must obtain a probable-cause warrant to collect phone-location records via geofence searches in cases like a 2019 Midlothian, Virginia bank robbery.
6/30/2026 • Regulation, Law & Enforcement • General
The U.S. Supreme Court ruled in Chatrie v. United States that broad geofence requests for cellphone location data from Google are Fourth Amendment searches requiring warrants.
6/29/2026 • Regulation, Law & Enforcement • General
The U.S. Supreme Court ruled in Chatrie v. U.S. that geofence warrants for Google cell location history require probable cause, a signed warrant, and constrained scope.
6/29/2026 • Regulation, Law & Enforcement • General
In Chatrie v. The United States, the Supreme Court ruled that geofence-based collection of phone location data is a Fourth Amendment search.
6/29/2026 • Regulation, Law & Enforcement • General
Supreme Court justices in April 2026 heard arguments in Chatrie v. United States about geofence warrants for pooled Google cellular location data under the Fourth Amendment.
6/24/2026 • Regulation, Law & Enforcement • General
Supreme Court review of Chatrie v. United States examines whether police can use Google geofence location-history data from a 2019 Virginia robbery to identify suspects.
5/20/2026 • Regulation, Law & Enforcement • General
NACDL legal advocate Mike Price discusses how geofence warrants in Chatrie v. United States could constitute broad Fourth Amendment searches using Google location history data.
5/17/2026 • Regulation, Law & Enforcement • General
Supreme Court oral arguments in Chatrie v. United States challenge whether geofence warrants for cellphone location data from Google require Fourth Amendment treatment as a search.
4/29/2026 • Regulation, Law & Enforcement • General
The US Supreme Court reviewed Chatrie v. United States on whether geofence warrants using smartphone location data are unconstitutional searches under the Fourth Amendment.
4/28/2026 • Regulation, Law & Enforcement • General
Supreme Court justices debated Chatrie v. United States, assessing whether geofence warrants can constitutionally access Google location data without violating Fourth Amendment limits.
4/27/2026 • Regulation, Law & Enforcement • General
The Supreme Court will hear Chatrie v. United States on whether geofence warrants require Fourth Amendment warrants for police access to location data from technology companies.
4/27/2026 • Regulation, Law & Enforcement • General
The Supreme Court is considering in Washington whether police geofence warrants for cellphone location data from broad areas violate Fourth Amendment protections.
4/27/2026 • Regulation, Law & Enforcement • General
The Supreme Court decided June 29 in Chatrie v. United States that Fourth Amendment protections apply to granular cloud location history requested through geofence warrants.
7/24/2026 • Regulation, Law & Enforcement • General
Supreme Court in Chatrie v. U.S. requires police warrants for geofencing-based cellphone location-history collection from Google or carriers while other digital search exceptions remain.
7/9/2026 • Regulation, Law & Enforcement • General
On June 29, 2026, the Supreme Court held in Chatrie v. United States that geofence warrants requiring Google Location History disclosures are Fourth Amendment searches, remanding probable cause issues.
7/8/2026 • Regulation, Law & Enforcement • General
The US Supreme Court decided Chatrie v. United States on Fourth Amendment warrant requirements for police geofencing and phone-number collection.
6/30/2026 • Regulation, Law & Enforcement • General
U.S. Supreme Court ruled in Chatrie v. United States that short-term location tracking via geofence warrants can be a Fourth Amendment search and app-generated records deserve protection.
6/29/2026 • Regulation, Law & Enforcement • General
The U.S. Supreme Court ruled in 2026 in Chatrie v. United States that law enforcement searches Google Location History through geofence warrants, potentially affecting Flock Safety license plate surveillance nationwide.
8/13/2026 • Regulation, Law & Enforcement • General
The Supreme Court held in Chatrie v. United States that Virginia police required Fourth Amendment justification to obtain Google location-history data during a 2019 bank-robbery investigation.
8/4/2026 • Regulation, Law & Enforcement • General
On June 29, 2026, the U.S. Supreme Court ruled in Washington that Virginia police access to Google Location History through a robbery geofence warrant was a Fourth Amendment search.
8/3/2026 • Regulation, Law & Enforcement • General
The U.S. Supreme Court in Chatrie v. United States required Fourth Amendment warrants for access to Google location history held by a third party on June 29, 2026.
7/9/2026 • Regulation, Law & Enforcement • General
Justice Neil Gorsuch, concurring in Chatrie v. United States, said Google Location History is protected as personal effects under the Fourth Amendment despite third-party storage.
6/29/2026 • Regulation, Law & Enforcement • General
The US Supreme Court ruled in Chatrie v. United States that police need a warrant to obtain cell phone location history held by companies like Google and Apple.
6/29/2026 • Regulation, Law & Enforcement • General
The Supreme Court in Chatrie ruled geofence searches using cellphone location data require warrants and probable cause, reshaping Fourth Amendment analysis for digital surveillance.
7/13/2026 • Regulation, Law & Enforcement • General
Supreme Court ruled geofence cellphone location surveillance requires warrants, narrowing the third-party doctrine in Chatrie v. United States.
7/6/2026 • Regulation, Law & Enforcement • General
The U.S. Supreme Court in 2026 ruled in Chatrie v. United States that geofence warrant retrieval of Google cell-phone location data is a Fourth Amendment search.
7/6/2026 • Regulation, Law & Enforcement • General
The U.S. Supreme Court ruled on June 29, 2026, in Washington, D.C., that police geofence searches of location data receive Fourth Amendment protection.
8/14/2026 • Regulation, Law & Enforcement • General
The U.S. Supreme Court held in Chatrie v. United States that obtaining Google location history through a geofence warrant was a Fourth Amendment search in the 2019 Midlothian, Virginia, robbery investigation.
8/14/2026 • Regulation, Law & Enforcement • General
The U.S. Supreme Court ruled in Washington, D.C., that police access to Google location history through a geofence warrant receives Fourth Amendment protection, while data brokers and mandated databases remain largely outside the ruling.
8/12/2026 • Regulation, Law & Enforcement • General
Interesting
Matthew Tokson reviews Chatrie v. United States, in which the Supreme Court ruled that geofence cellphone location searches require a warrant supported by probable cause.
7/15/2026 • Regulation, Law & Enforcement • General
In Chatrie, the Supreme Court in the USA held that police access to Google Location History is a Fourth Amendment search and remanded remaining warrant issues.
6/30/2026 • Regulation, Law & Enforcement • General
The U.S. Supreme Court expanded warrant protections for digital location-history data in Chatrie v. United States and remanded reverse-search questions to the Fourth Circuit.
8/13/2026 • Regulation, Law & Enforcement • General