A federal judge in Oklahoma has ruled that a sheriff’s deputy violated the Fourth Amendment by searching a month of a driver’s movements in Flock’s license plate camera network without a warrant. U.S. District Judge Sara E. Hill suppressed all evidence that followed, including 91 pounds of methamphetamine, in the case United States v. Kyle in the Northern District of Oklahoma, TechCrunch reported on Oct. 3.
The ruling is one of the first by a federal court to find a Flock database search unconstitutional. It is a trial-level decision, so it does not bind other judges. It lands as lawmakers in several states weigh limits on the cameras, which record every passing vehicle and keep the data for later searches.
How the Flock database search in United States v. Kyle began
The defendant is Melisa Susan Kyle. According to Gizmodo’s account of the opinion, a Tulsa County sheriff’s deputy working with a DEA task force followed her California-plated Mazda “for no apparent reason” other than the plates. CBS12 reported the vehicle was a rental.
Before he saw any traffic violation, the deputy ran the plate through Flock and a second system called VehicleManager. The search returned more than 50 sightings over about 30 days, across several states. Law Commentary’s summary of the opinion said the records traced a route from Oklahoma toward California and Arizona and back through Missouri.
The deputy then stopped the car for minor traffic violations and later searched it. He found 91 pounds of methamphetamine, according to TechCrunch. Kyle moved to suppress the evidence. Hill granted the motion and also found that the deputy had extended a valid traffic stop for a drug investigation without reasonable suspicion, per CBS12.
Accounts vary on the date of the ruling. Law Commentary put it at Oct. 1, CBS12 and Gizmodo gave Oct. 3 and Oct. 5, and the Daily Caller dated its report Oct. 4. TechCrunch’s coverage ran Oct. 3.
What Judge Hill wrote about Flock and mass surveillance
Hill described the system in blunt terms. “This is a type of indiscriminate mass surveillance,” she wrote, according to Gizmodo. She said the cameras collect data on all vehicles that pass any network-connected camera, at all times, and make it available to police on demand.
The Daily Caller quoted a second passage in which she wrote that freedom from persistent, dragnet-style surveillance in public is a concept society already accepts. Gizmodo also reported that she asked from the bench why it is the government’s business where everyone goes all the time.
Hill drew on a line of Supreme Court cases about tracking. Law Commentary said she distinguished United States v. Knotts, the 1983 decision that allowed police to follow a car in real time on public roads. In her view, Flock raises a different question because the network records and stores sightings before anyone is a suspect, then lets police search the history later. The reasoning is similar to the Supreme Court’s 2018 decision in Carpenter v. United States, which required a warrant for historical cell-phone location records.
The court said police cannot use a vast network of cameras to collect vehicle data indiscriminately and then pull a detailed history of a person’s movements without probable cause and a warrant, according to CBS12.
Limits of the ruling and Flock’s response
The holding is narrow. CBS12 reported that it applies to historical, multistate searches of vehicle movements over an extended period. It does not bar all license plate reader use, and a single camera read of a plate at one location is not covered.
Flock disagreed. The company said the decision goes against the “overwhelming weight of authority” in similar cases across the country, according to the Daily Caller. Law Commentary reported the company also called the ruling limited to the facts of Kyle’s case and said it expects an appeal. The reports reviewed did not include a statement from the sheriff’s office or prosecutors.
Federal prosecutors can appeal a suppression order to the 10th U.S. Circuit Court of Appeals, which covers Oklahoma. Flock has said it expects the ruling to be reversed on appeal.
What the numbers show about a month of tracking
The record in this case gives a measure of how much a plate query can reveal. More than 50 sightings across about 30 days works out to roughly 1.7 records a day, or one every 14 hours or so, for one rental car on a cross-country drive. The deputy had that history in hand before he had a traffic violation or any other suspicion.
Hill’s opinion treats that volume as the point. A single sighting tells police where a car was at one moment. Fifty strung together tell them where a person went, how long the trip took and where it ended.
TechCrunch reported that Florida and Texas have moved to restrict Flock use. It also reported that Sen. Bernie Sanders introduced legislation this month to bar federal agencies from using automated license plate readers.
Police departments that use Flock now have a federal district court opinion to weigh. Where an officer runs a plate to look back through weeks of travel, with no warrant and no stop in progress, this ruling says the Fourth Amendment applies.
Image: Exterior photo of the federal courthouse in Tulsa, Oklahoma, shot by Onsite! staff or taken from a federal court file; federal government imagery is public domain and needs no license.
