The U.S. Attorney's Office argues there was "no Fourth Amendment violation" in the deputy's use of the plate-reader data
U.S. Attorney's Office for the Northern District of OklahomaAssistant U.S. Attorney Tyson McCoy, signing the United States' opposition to the motion to suppress (ECF No. 50)
In its August 10, 2026 opposition to the motion to suppress, the U.S. Attorney's Office for the Northern District of Oklahoma argued that Kyle's license plate was in public view on public roadways when plate-reader cameras captured it, so no Fourth Amendment privacy interest was invaded when Deputy Alaniz used the data. It also argued that Oklahoma's rules on plate-reader use do not decide the federal question. The brief defends the traffic stop, the extended detention and the search of the car on separate grounds.
Responding to
Because a license plate on a public road is in plain view, Melisa Kyle had no Fourth Amendment expectation of privacy in plate-reader information about where her car was seen, so Deputy Alaniz's use of that information violated no Fourth Amendment right.
“In the present case, Ms. Kyle had no Fourth Amendment expectation of privacy in information in her license plate which was open to public view on public roadways. Therefore, there was no Fourth Amendment violation when Deputy Alaniz viewed her license plate information that had been obtained from cameras capturing information on public roadways.”
Original text
Where this statement fits
Did a deputy's warrantless query of Flock license-plate data violate the Fourth Amendment, as a federal judge in Oklahoma ruled?
On October 1, 2026, U.S. District Judge Sara E. Hill of the Northern District of Oklahoma held in United States v. Kyle that a Tulsa County deputy's warrantless query of the Flock and VehicleManager license-plate-reader databases was a search that violated the Fourth Amendment. The deputy, Freddie Alaniz, ran the query on a Mazda with a California plate in May 2026 and got more than 50 records of its location over about a month across several states. He reviewed that history while questioning the driver, Melisa Kyle. Judge Hill gave two independent grounds for suppression: the query, which led her to suppress all evidence obtained after it began, and Alaniz's extension of the traffic stop without reasonable suspicion. The U.S. Attorney's Office had argued that plates on public roads are in plain view and carry no Fourth Amendment privacy interest. Flock Safety says the ruling goes against the weight of authority, is limited to its facts and expects it to be overturned on appeal. The opinion is one district court's decision in a criminal case. Kyle is charged, and no court has decided whether she committed the offense. As of October 4, 2026, the docket shows no notice of appeal.
Source and context
Original text
About this source
The government's 24-page response to the motion to suppress. It gives the government's account of the May 10, 2026 stop, argues that the stop, the extended detention and the vehicle search were lawful, and argues in Part IV that using plate-reader data obtained in plain view on public roads did not violate the Fourth Amendment. It does not argue the good-faith exception to the exclusionary rule.
Archived copy (opens in a new tab)Before the quotation
Kyle's lawyers moved to suppress on August 3, 2026, challenging the plate-reader query, the stop and the detention after the warning. The brief answers all three grounds.
After the quotation
On October 1, 2026, Judge Hill rejected this argument as to the plate-reader query. She found the stop valid at its start but held that the later detention was unlawful. As of October 4, 2026, we could not locate a public statement from the U.S. Attorney's Office on the ruling.
How this statement is classified
The label describes this statement's response within the context above.
Why this label?
The reference point is the proposition that the warrantless query was a search that violated the Fourth Amendment. The brief argues that plates on public roads carry no privacy interest and that the deputy's use of the data violated nothing, which defends the query as lawful, so we used Defended or excused. The closest competing label is Denies. It loses because the brief argues the query was lawful under the plain-view principle and never says that a stated fact is false.
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More from this case
Read the full caseLaw professor Matthew Tokson calls the opinion "A major ruling" that applies Chatrie to extensive camera networks
“A federal district judge just declared that Flock camera systems violate the Fourth Amendment! Applying Chatrie, the court concludes that extensive camera networks engage in unlawful "indiscriminate mass surveillance." A major ruling.”Read statement
Flock Safety says the ruling "goes against the overwhelming weight of authority" and that it expects the ruling to be "appealed and ultimately overturned"
Flock Safety
“Flock was not a party to this case. The ruling goes against the overwhelming weight of authority in similar cases across the country, including multiple recent decisions in Oklahoma, and we expect it will be appealed and ultimately overturned. This ruling is limited to the specific facts of this case. It does not set controlling precedent and does not affect law enforcement agencies’ continued use of these important public safety technologies.”Read statement
Institute for Justice lawyer Michael Soyfer calls the opinion "extremely important" and says earlier courts were "way too myopic"
Institute for Justice
“The opinion is pretty amazing. It recognizes one thing that courts ignore which is the sheer breadth of these systems, that they collect so much information about so many people in a way that sets them apart. This decision ascribes appropriate weight to the fact police are building out this massive database that can reveal incredibly intimate details of people’s lives … It’s extremely important. The way courts have resolved these cases previously has been way too myopic and has ignored the depths of these systems and the sweeping modes of surveillance that allow police to reconstruct the movements of anyone in the country.”Read statement
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The Dispute Index. "The U.S. Attorney's Office argues there was "no Fourth Amendment violation" in the deputy's use of the plate-reader data". First published: 2026-10-04. Last updated: 2026-10-04. https://disputeindex.com/events/4531-in-its-august-10-2026-opposition-to-the