A federal judge has thrown out 91 pounds of methamphetamine and about $7,000 in cash seized during a Tulsa County traffic stop, ruling that a sheriff’s deputy violated the Fourth Amendment when he searched a month’s worth of a driver’s location history through automated license-plate-reader databases without a warrant.
U.S. District Judge Sara Hill issued the ruling in the federal case against Melisa Kyle, who was charged with possessing methamphetamine with intent to distribute after the drugs and cash were found in her rented SUV.
The case began when Tulsa County Deputy Sheriff Freddie Alaniz, who also works with the Drug Enforcement Administration, spotted a Mazda SUV with a California license plate on an Oklahoma highway. According to Judge Hill’s ruling, Alaniz began following the vehicle for no apparent reason other than the out-of-state plate.
Alaniz then ran the plate through Flock and VehicleManager, two automated license-plate-reader systems that log photographs, dates, times and locations whenever a participating camera captures a vehicle. The search returned more than 50 records tracking the Mazda’s movements over roughly a month, across multiple states, showing it had made a short trip to the California-Arizona border area and was heading back toward Missouri.
Alaniz later observed what Hill found to be a valid traffic violation and pulled Kyle over. After issuing a warning and handing back her license, he asked to search the SUV. Kyle refused. Alaniz then held her for a drug-dog sniff; the dog alerted, and the subsequent search turned up the drugs and cash.
Two Constitutional Violations
Judge Hill found that Alaniz violated the Fourth Amendment in two separate ways.
First, she ruled he lacked reasonable suspicion to extend the stop after returning Kyle’s license and issuing the warning. Prosecutors had pointed to Kyle’s short trip, amount of luggage, nervousness, cigarette smoking, use of a rental vehicle and what they described as a questionable explanation for her travel. Hill rejected that reasoning, writing that those same details describe ordinary behavior for innocent travelers on long road trips.
Second, and more significantly, Hill ruled that searching Kyle’s stored license-plate data was itself a search requiring a warrant. She distinguished between an officer simply seeing a car on a public road and law enforcement quietly pulling a month of a vehicle’s movement history from a nationwide database, calling the latter “indiscriminate mass surveillance.”
“Why is it the government’s business where everyone goes all the time?” Hill wrote.
In reaching her conclusion, Hill relied heavily on the U.S. Supreme Court’s recent decision in Chatrie v. United States, which recognized a privacy interest in historical cell-phone location data.
What the Ruling Does and Doesn’t Mean
The decision does not ban the use of Flock cameras, does not create binding precedent beyond this case, and does not mean every license-plate database query now requires a warrant. Hill herself acknowledged that nearly every court to previously consider the question, including another federal judge in Oklahoma, reached the opposite conclusion — a split that makes a government appeal likely.
Even if the Justice Department appeals and persuades the 10th Circuit Court of Appeals that the plate-reader search was lawful, it would still have to overturn Hill’s separate finding that Alaniz unlawfully prolonged the traffic stop in order to revive the case against Kyle.
The ruling adds Tulsa County to a growing national debate over how far police and automated surveillance tools can go in tracking Americans’ movements on public roads without first getting a judge’s sign-off.
