Geofence Warrants Reach the Supreme Court. Your Privacy Is at Stake.

Geofence Warrants Reach the Supreme Court. Your Privacy Is at Stake. Geofence warrants let police demand Google hand over every phone that was near a crime scene — suspect or not. The Supreme Court heard oral arguments on April 27, 2026 in Chatrie v. United States, and a decision is expected by July. The outcome will determine whether your location history is permanently accessible to law enforcement. How Geofence Warrants Work Police identify a geographic area and time range related to a crime They subpoena Google for every device in that geofence Google returns anonymized device IDs Police narrow the list based on movement patterns For remaining devices, police request identifying information The problem: Innocent bystanders are routinely swept up. Attending a protest, visiting a clinic, or eating at a restaurant near a crime makes you a suspect. A single geofence warrant can sweep up data from hundreds of devices belonging to people with no connection to any crime. The Supreme Court Case: Chatrie v. United States The case before the Court began in May 2019, when a man armed with a gun robbed a federal credit union in Midlothian, Virginia, escaping with $195,000. Surveillance footage showed the robber speaking on a cellphone. With no leads after two months, police served a geofence warrant on Google demanding location data for every device within a 150-meter radius of the bank, one hour before and after the robbery. Google returned anonymized data for 19 devices. Police narrowed the list to three based on movement patterns, then obtained identifying information. One of those three was Okello Chatrie, a 24-year-old Jamaican immigrant. He was arrested, and officers found $102,293 and a 9mm pistol at his residence. Chatrie pleaded guilty while reserving the right to appeal the geofence warrant. The questions presented to the Court: Do geofence warrants violate the Fourth Amendment's prohibition on unreasonable searches? Are they "general warrants" — the exact type the Framers wrote the Fourth Amendment to prevent? And does voluntarily enabling Google Location History constitute consent to government surveillance? The Fourth Circuit split 7-7 on whether a search even occurred, leaving a lower ruling in place. The Fifth Circuit, meanwhile, ruled in a separate case that geofence warrants are categorically unconstitutional general warrants. This circuit split made Supreme Court review almost inevitable. During oral arguments, the justices appeared divided. Justice Sonia Sotomayor pressed the government on the scope: "If this is consent, that means the government can seek those documents for any reason, not just the commission of a crime, or no reason, correct?" Justice Brett Kavanaugh suggested the Court could set parameters on geographic and temporal scope rather than banning the practice outright. A decision is expected by late June or early July 2026. The Post-Carpenter Explosion The Supreme Court's 2018 decision in Carpenter v. United States required police to obtain a warrant before collecting cell-site location information from wireless carriers. That ruling was hailed as a landmark privacy victory. But law enforcement adapted quickly — simply shifting their requests from carriers to tech companies like Google, which held even more precise location data. The result was explosive growth. Google received 982 geofence warrants in 2018, 8,396 in 2019, and 11,554 in 2020. By 2025, geofence requests accounted for more than 25% of all US warrants Google received, with the number continuing to climb. Data from 2025 shows police departments issued an estimated 10,000+ geofence warrants per year, and Google received approximately 25% more geofence requests each quarter through 2025. These warrants are used for crimes ranging from bank robbery to car break-ins. In Minnesota alone, geofence warrants jumped from 22 in 2018 to 173 in 2020 — a 686% increase in two years. The Google Workaround In December 2023, Google announced it would migrate Location History data from its centralized Sensorvault database to individual users' devices. By mid-2025, Google confirmed the migration was complete and that it could no longer respond to geofence warrants for data stored on-device. But this is not a complete solution: Users who opted to back up location data to Google's servers still have accessible data Law enforcement has shifted to other sources — cell tower dumps, commercial data brokers, and other tech companies Apple restricts cellular network access to precise location data on iOS, but Android remains more vulnerable because Google's Location History is deeply integrated into the OS When the Algorithm Gets It Wrong Geofence warrants have ensnared innocent people who happened to be in the wrong place at the wrong time. Zachary McCoy (Florida, 2019): Google emailed McCoy that Gainesville police were seeking information about his account. A 97-year-old woman's home had been burglarized. McCoy had enabled Google's location services to track his bike rides via the RunKeeper app. The exercise data showed him biking past the woman's house three times — laps around his own neighborhood. He borrowed $7,000 from his parents to hire a lawyer, who persuaded police to withdraw the warrant. Jorge Molina (Arizona, 2018): Molina spent six days in jail for a murder he did not commit. A geofence warrant placed his phone at the murder scene. The explanation: Molina had given his mother's ex-boyfriend his old cellphone, which was still logged into his Google account. The ex-boyfriend was later arrested for the killing. Molina's attorney said, "Police are basically treating this like it's DNA or fingerprint evidence, but it's not." Okello Chatrie's own case: The geofence warrant swept up 16 innocent people alongside Chatrie. Those 16 individuals had their location data searched by the government without any suspicion of wrongdoing, simply because they happened to be near a bank in suburban Virginia during rush hour. FBI's Commercial Data Loophole The FBI has found an even simpler way around the Fourth Amendment: just buy the data. In March 2026, FBI Director Kash Patel confirmed to the Senate Intelligence Committee that the bureau purchases commercially available location data from data brokers — no warrant required. "We do purchase commercially available information that's consistent with the Constitution and the laws under the Electronic Communications Privacy Act," Patel said. This contradicts what former Director Christopher Wray told Congress in 2023, when he stated the FBI had stopped buying such data. Federal agencies including ICE, CBP, and the Secret Service have contracts with data brokers like Babel Street, Venntel, and Penlink. These companies harvest location data from the advertising technology ecosystem — when a phone app requests location permission, that data enters the real-time advertising bid-stream, where brokers intercept and repackage it for government surveillance. ICE's Webloc tool can identify every smartphone in a given area and time, then track those phones to their owners' homes. Senator Ron Wyden called the practice "an outrageous end-run around the Fourth Amendment" and is pushing for the Government Surveillance Reform Act, which would require a warrant before such purchases. As of May 2026, the bill remains in committee. Apple vs. Google Your phone's operating system dramatically affects your exposure to geofence surveillance. Apple (iOS): Apple restricts third-party apps from accessing cellular network-level location data. Apps must request location permission, and iOS provides granular controls (Allow Once, Allow While Using, Always, or Never). Crucially, Apple does not maintain a centralized location history database comparable to Google's Sensorvault, making large-scale geofence data demands far less effective. Google (Android): Location History is a core Google service, deeply integrated into Android. Even with Location History disabled, Google still collects some location data through Web & App Activity and other services. Google's own transparency reports confirm that the vast majority of geofence warrants target Android devices. The practical difference: If you carry an iPhone, your location data is harder for law enforcement to obtain through geofence warrants. If you carry an Android phone, Google likely has years of your precise location history available to any prosecutor with a geofence warrant. State-Level Pushback With the Supreme Court still deliberating, states are moving to fill the gap: California: AB-1355 would prohibit covered entities from collecting or processing location information unless necessary to provide requested services, and would block disclosure of location data to government agencies without a valid California court order. Minnesota: A bipartisan bill (SF 1120 / HF 103) would ban reverse-location warrants except in sudden emergencies and create a private right of action for anyone whose data was improperly obtained. The Minnesota Supreme Court ruled in State v. Contreras-Sanchez (April 2026) that geofence warrants are not automatically unconstitutional but must meet strict particularity requirements — officers cannot decide on their own which devices to investigate further without judicial oversight. New York: The Reverse Location and Reverse Keyword Search Prohibition Act (A407/S404) would ban geofence warrants and keyword search warrants entirely. The bill has been introduced in multiple legislative sessions and remains in committee as of May 2026. Washington: The My Health My Data Act prohibits private entities from geofencing health care facilities. Washington's constitution, Article I Section 7, provides stronger privacy protections than the Fourth Amendment, and the state supreme court has specifically recognized privacy rights in cell phone location data. What You Can Do Now While the courts deliberate, you can take steps to protect your location data: Step 1: Disable Location History Go to myactivity.google.com Navigate to Location History and turn it off Also disable Web & App Activity or set it to auto-delete every 3 months Step 2: Delete Existing Location Data In Google Maps, tap your profile picture > Timeline > More > Settings > Delete all Location History On Android: Settings > Location > Google Location History > Delete Check third-party apps (Uber, Lyft, fitness trackers) that may store separate location records Step 3: Audit Your Google Account Visit takeout.google.com to see exactly what Google has stored Review connected apps that have location permissions Revoke access for apps that do not need your location Step 4: Use Airplane Mode or Faraday Protection Enable airplane mode when visiting sensitive locations (medical clinics, protests, attorney offices) Consider a Faraday pouch for your phone in high-risk situations Even with Location History off, your phone connects to cell towers and WiFi networks that can reveal your location Step 5: Test Your Device Use our VPN Leak Test tool to check whether your device is leaking location data Review your app permissions regularly in Settings > Privacy > Location Services Step 6: Consider Your Platform iOS provides stronger default protections against location data collection by both apps and law enforcement If using Android, consider privacy-focused alternatives like GrapheneOS Regardless of platform, minimize location permissions to "While Using" or "Ask Next Time" **Your location data is a permanent record of where you go, who you meet, and what you believe. The Supreme Court will decide whether the Fourth Amendment protects it. You don't have to wait for them. Use our privacy toolkit and VPN Leak Test to take control now.