BREAKING: Federal Judge Rules Warrantless, Weeks-Long Police Tracking via Flock Cameras Unconstitutional
A federal judge in Oklahoma has ruled that police violated constitutional rights by extracting a driver’s historical travel data from Flock license plate cameras without a search warrant.
On October 1, 2026, the U.S. District Court for the Northern District of Oklahoma suppressed key evidence in United States v. Melisa Susan Kyle (Case No. 26-CR-00189-SEH). The court held that searching Flock and another automated license plate reader (ALPR) system without a warrant constitutes an illegal search under the Fourth Amendment.
The Incident and Search Scope
During a traffic stop, Tulsa County Deputy Freddie Alaniz ran a California license plate through the ALPR system. The query returned over 50 individual sightings spanning more than 30 days across multiple states. The data tracked the vehicle moving from Locust Grove, Oklahoma, toward the California–Arizona border, and back toward Missouri.
The ALPR network operates via fixed and vehicle-mounted cameras that photograph license plates while logging the exact date, time, and location. Law enforcement officers can search this national database at will. In this case, the deputy queried weeks of movement data using broad justifications such as "traffic violation" and "investigation"—all without probable cause or a warrant.
The Court’s Privacy Analysis
The court emphasized that individuals retain a reasonable expectation of privacy in the aggregate log of their physical movements, even when traveling on public roads. While precedent allows officers to follow a vehicle during a single discrete trip, the court distinguished mass ALPR surveillance as dragnet tracking. Because modern plate-reader networks can trace a vehicle across state lines over extended periods, accessing that historical profile requires a judicial warrant.
The Traffic Stop and Prolonged Detention
Although the initial stop was lawful—prompted by a tailgating violation under Oklahoma traffic law—the court found that the deputy lacked reasonable suspicion to prolong the stop after returning the driver's documents. Factors such as driver nervousness, a rental vehicle, visible luggage, and a short itinerary did not justify detaining her to conduct a drug-sniffing dog scan.
The Legal Outcome
Because both the extended detention and the warrantless ALPR search violated Fourth Amendment protections, the court suppressed all downstream evidence, including the subsequent vehicle search and the defendant's statements.
While the ruling does not halt the operation of automated license plate cameras, it establishes that searching an individual's stored historical driving records without a warrant is unconstitutional.