“Why is it the government’s business where everyone goes all the time?” Judge Sara E. Hill wrote in her recent ruling that a deputy’s search of Flock cameras violated the Fourth Amendment. The federal judge in Oklahoma’s language about AI road surveillance could shape how police use license plate readers far beyond Tulsa.
Flock Safety’s cameras are AI-powered automated license plate readers (ALPR) that photograph every passing vehicle and log where it went. In Hill’s October 1 ruling, a Tulsa County deputy searched a passing car’s plate in Flock’s system apparently because it had a California tag, then used the car’s travel history to justify searching it. The case involves Melissa Kyle, charged in May with possessing methamphetamine with intent to distribute. According to the ruling, Deputy Freddie Alaniz began following her SUV “for no apparent reason other than the fact it had a California license plate.” He had access to Flock and a second system, VehicleManager, which showed at least 30 days of the vehicle’s movements across multiple states. He listed his reasons for the queries as “traffic violation” and “investigation.” Seeing the car had traveled toward the California-Arizona border and back, he suspected drug trafficking.
Hill said the stop was justified at its start, after the deputy noted two traffic violations. But he extended it after returning Kyle’s documents, and when she refused a search, detained her for a dog sniff. Deputies reportedly found 91 pounds of methamphetamine and $7,000 in cash. Hill held that the deputy lacked reasonable suspicion to extend the stop and had conducted an “unconstitutional warrantless search.”
Her broader language is what matters to those outside of Oklahoma. Hill described these networks as “indiscriminate mass surveillance” that continuously collect location history for every vehicle and serve it to police on demand. She wrote that it’s “constitutionally problematic” for law enforcement to “indiscriminately and passively catalog your whereabouts over an extended period of time and then use that information for any purpose whenever convenient.” She acknowledged the technology’s “remarkable benefits,” but said the Fourth Amendment “requires courts to draw a line when the cost is too great.”
Her ruling stands out because it goes against what many judges across the country have ruled. Most have generally held that license plate readers don’t violate the Fourth Amendment because they only record cars on public roads. Flock says the ruling “goes against the overwhelming weight of authority,” expects it to be appealed and overturned, and notes it isn’t a named party and that the decision “does not set controlling precedent.”
But the debate is growing as AI road surveillance gets more powerful. Wired has reported that Flock’s next-generation system allows open-ended AI queries of license plate data, combined with arrest records, case files, and commercial data broker databases. Civil liberties advocates say that kind of analysis leads to “pretextual stops,” in which police use a minor claimed infraction to pull over drivers flagged for their travel patterns. The Associated Press reported Border Patrol monitoring drivers nationwide for “suspicious” travel patterns, and a Texas jury recently sided with a salesman who said police stopped him after a federal fusion center flagged his round trip from Houston to Carrizo Springs.
Public opposition to Flock cameras is spreading, too. Asheville, North Carolina, voted 5-2 in August to end its contract and remove 11 cameras after residents raised privacy and surveillance concerns, and Lynchburg, Virginia, voted 6-1 to end its Flock contract, according to local reports. Santa Cruz, California, ended its contract in January. In Michigan, South Lyon’s council voted 5-2 to cover its cameras after residents raised data privacy and Fourth Amendment concerns. Vineyard, Utah, voted October 27 to have Flock cameras removed, and two dozen Texas cities and counties have moved to end contracts or remove plate readers, according to the Houston Chronicle. San Diego’s budget committee has voted to end its contract, though the full council must still approve it.
There are no shortage of legal troubles for Flock Safety, either. California Attorney General Rob Bonta sued El Cajon in October 2025 for sharing license plate data with out-of-state agencies, which California law prohibits. Mountain View shut down its Flock network, and the city alleges Flock, not police, enabled out-of-state access. A law firm filed an amended class action against Flock in April alleging illegal tracking and data sharing.
The legal fight now centers on a basic question. If a camera network records every car, all the time, and AI road surveillance can sort the results into suspects, is that a search? A federal judge in Tulsa says it can be. The next court to answer may say otherwise. There’s no end in sight for the debate on AI road surveillance.