The Federal Public Defender argues the plate-reader search "violated the Fourth Amendment"
Office of the Federal Public Defender, Northern District of OklahomaAssistant Federal Public Defender Robert S. Williams, signing the defendant's opposed motion to suppress (ECF No. 47)
In its August 3, 2026 motion to suppress, the Federal Public Defender's office argued for Melisa Kyle that Deputy Alaniz's retrieval of her historical location data from plate-reader databases was a search under the Fourth Amendment, whether or not that data is as detailed as cell-site or GPS data. The motion argued the search was done without a warrant, probable cause or reasonable suspicion, and asked the court to suppress all evidence derived from it.
Responding to
Deputy Alaniz's retrieval of Melisa Kyle's historical location data from plate-reader databases was a search under the Fourth Amendment whether or not plate-reader data is as detailed as cell-site or GPS data, and the evidence derived from it should be suppressed.
“Such surveillance contravenes Ms. Kyle’s reasonable expectations of privacy; therefore, the ALPR search violated the Fourth Amendment and all evidence derived from that search should be suppressed.”
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 24-page motion, filed with 21 exhibits, asking the court to suppress all evidence obtained on May 10, 2026. It argues that the plate-reader search was an unconstitutional search, that the stop was invalid at its start, and that Kyle was held after the stop ended without reasonable suspicion.
Archived copy (opens in a new tab)Before the quotation
The motion argues three grounds: that the plate-reader query was an unconstitutional search, that the stop was invalid at its start, and that Kyle was held after the stop ended without reasonable suspicion.
After the quotation
On October 1, 2026, Judge Hill accepted the first and third grounds and rejected the second. The same office then filed a motion asking the court to revoke Kyle's detention order.
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 motion asserts that proposition and asks for suppression on that basis, so we used Condemned. The closest competing label is Challenges the characterization. It loses because the motion argues that the query itself violated the Constitution, which goes beyond disputing how it is described.
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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
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- The Federal Public Defender argues the plate-reader search "violated the Fourth Amendment"
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- https://disputeindex.com/events/4532-in-its-august-3-2026-motion-to-suppress
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The Dispute Index. "The Federal Public Defender argues the plate-reader search "violated the Fourth Amendment"". First published: 2026-10-04. Last updated: 2026-10-04. https://disputeindex.com/events/4532-in-its-august-3-2026-motion-to-suppress