Supreme Court’s Landmark Ruling In Chatrie V. United States: Major Privacy Win For Digital Location Data — What It Means For Flock Cameras In Georgia

On June 29, 2026, the U.S. Supreme Court issued a significant decision in Chatrie v. United States, 609 U.S. ___ (2026), that strengthens Fourth Amendment protections against government access to precise digital location data. The Court held that law enforcement’s use of a “geofence warrant” to obtain Google Location History data constituted a Fourth Amendment search, extending the privacy principles from Carpenter v. United States (2018).

For Georgia residents facing criminal charges — especially those involving surveillance technology like Flock Safety automated license plate readers (ALPRs) — this ruling provides powerful new arguments to challenge evidence obtained through mass digital tracking.

As a Georgia illegal search and Fourth Amendment defense attorney, I closely follow these developments because they directly impact how police gather and use data in cases across the state.

The Facts Of Chatrie V. United States

In May 2019, a credit union in Midlothian, Virginia, was robbed. Surveillance footage and witness statements showed the suspect appeared to be talking on a cell phone near the scene.

Police could not identify the robber through traditional means. On June 14, 2019, they obtained a geofence warrant from a Virginia magistrate directed at Google. The warrant sought anonymized Location History data for any cell phones within a 150-meter radius of the credit union during a specific one-hour window around the robbery.

Google’s Location History service is highly precise:

• Records location approximately every two minutes
• Accuracy within about 20 meters
• Uses GPS, Wi-Fi, Bluetooth, cell towers, and even estimates elevation (floor level inside buildings)

The warrant used a controversial three-step process:

1. Google provided anonymized data for all devices inside the geofence during the initial time window.
2. Officers could narrow the list and request additional location data (including movements outside the original geofence) for a longer period.
3. Officers could further narrow and obtain identifying information (names, phone numbers, etc.) for remaining accounts.

Google complied. The data ultimately identified three users, including petitioner Okello Chatrie. His movements placed him near the scene and heading toward a residential area afterward. He was charged with robbery and firearms offenses.

Chatrie moved to suppress the Google data, arguing it was obtained through an unconstitutional search.

The Supreme Court’s Holding

In an opinion by Justice Kagan (joined by Chief Justice Roberts, Justice Sotomayor, Justice Kavanaugh, and Justice Jackson), the Supreme Court held:

Police officers conducted a Fourth Amendment search when they acquired Chatrie’s location data from Google because an individual has a reasonable expectation of privacy in such information.

The Court vacated the Fourth Circuit’s judgment and remanded the case for further proceedings on whether the specific geofence warrant satisfied the Fourth Amendment’s requirements of probable cause and particularity — especially regarding the multi-step process that allowed access to data beyond the original geofence without clear judicial limits.

Key Reasoning: Extending Carpenter To Precise Location History

The Court built directly on Carpenter v. United States, which held that accessing historical cell-site location information (CSLI) is a search because it reveals the “whole of [a person’s] physical movements.”

Location History data is even more revealing than traditional CSLI:

• Far greater precision (20 meters vs. cell sectors covering large areas)
• More frequent recording
• Ability to reconstruct movements retrospectively with “tireless and absolute surveillance”

The Court rejected the government’s argument that short-term (here, roughly two hours) monitoring does not implicate privacy interests. Even brief access to this type of data can expose intimate details of life.

Importantly, the Court declined to apply the traditional third-party doctrine in full. While users technically share data with Google, the Court found it is not “truly shared” in the sense of old bank or phone records cases. Modern cell phones are indispensable, and users do not reasonably expect their detailed location history to be turned over to the government.

Justice Gorsuch concurred in the judgment but advocated a property-based approach, viewing the data as Chatrie’s protected “effects.”

Justice Jackson (joined by Justice Sotomayor) concurred but emphasized the warrant’s lack of particularity in steps two and three.

Justices Alito and Barrett dissented, arguing no search occurred or that the short duration and public nature of the movements did not trigger Fourth Amendment protections.

How Chatrie Applies To Flock Cameras In Georgia

Flock Safety cameras are automated license plate readers (ALPRs) widely used by law enforcement agencies across Georgia and the country. These cameras capture:

• License plate numbers
• Vehicle make, model, and color
• Timestamps and GPS locations
• Sometimes images of the vehicle and driver area

Flock creates vast databases of vehicle movements. Police can query historical data to track where a specific vehicle has been over days, weeks, or months — often without obtaining a warrant.

Before Chatrie, many courts held that accessing ALPR data did not constitute a search because license plates are visible in public, and individual reads are brief (analogous to United States v. Knotts).

After Chatrie, the analysis changes significantly for comprehensive or historical queries:

1. Mosaic Theory Strengthened
   Just as compiling cell phone location data reveals the “whole of [someone’s] physical movements,” compiling Flock ALPR data over time can create a detailed mosaic of a person’s driving habits, home, work, medical visits, places of worship, and more. Chatrie reinforces that the aggregation of location data matters more than individual data points.
2. Geofence-Style Searches of Flock Databases
   If police use Flock data in a geofence-like manner (searching all vehicles that passed certain cameras during a time window), Chatrie strongly suggests this requires a warrant with proper particularity and probable cause — not a fishing expedition.
3. Retrospective Tracking Without a Warrant
   Querying Flock’s historical database to track a specific vehicle’s movements over an extended period is now more vulnerable to Fourth Amendment challenge. Defense attorneys can argue it is the digital equivalent of prolonged GPS tracking, which the Supreme Court has scrutinized.
4. Georgia-Specific Implications
   Flock cameras are deployed in many Georgia jurisdictions, including metro Atlanta areas. The ACLU of Georgia has raised serious concerns about privacy, data sharing, and potential misuse.
   Defendants charged with crimes where Flock data was used (e.g., locating a vehicle in a drug case, DUI, theft, or violent crime) now have stronger grounds to file motions to suppress.

While single, real-time plate reads at a traffic stop may still be defensible, historical database searches that reconstruct movements are much more likely to be deemed searches post-Chatrie.

Practical Takeaways For Georgia Criminal Defense

• Motions to Suppress Are Stronger: If police used Flock data (or similar ALPR systems) to develop probable cause or locate you without a warrant, we can challenge the evidence.
• Warrant Challenges: Even if a warrant was obtained for Flock or geofence-style data, we will scrutinize whether it was sufficiently particular and supported by probable cause — exactly the issues the Supreme Court flagged in Chatrie.
• Good-Faith Exception: Officers may still argue they relied in good faith on prior case law, but Chatrie changes the landscape and weakens that argument for future cases.
• Broader Digital Surveillance: This ruling also impacts other location-tracking technologies police increasingly use in Georgia.

Bottom Line

Chatrie v. United States is a major victory for privacy in the digital age. The Supreme Court recognized that when the government accesses comprehensive records of your physical movements — whether through your phone’s Location History or aggregated ALPR data — it implicates core Fourth Amendment protections.

For anyone in Georgia facing criminal charges where law enforcement used Flock cameras, cell phone data, geofence warrants, or similar surveillance tools, this decision opens new and powerful avenues for defense.

If you or a loved one has been charged with a crime and believe digital surveillance or illegal search tactics were used against you, do not wait. Evidence obtained in violation of the Fourth Amendment can often be suppressed, sometimes leading to dismissal of charges.

Contact Georgia Illegal Search Lawyer George Creal today for a confidential consultation.

www.georgialawyer.com
(770) 961-5511

We fight aggressively to protect your constitutional rights against overreaching government surveillance. Let us put this landmark Supreme Court ruling to work for your defense.