Federal Judge Calls Flock Search ‘Indiscriminate Mass Surveillance’ — Suppresses Evidence

U.S. District Judge Sara E. Hill. U.S. Senate Judiciary Committee / public domain via Wikimedia Commons.

A California plate — nothing more — was enough for a Tulsa County deputy to open Flock and VehicleManager and pull a month of highway sightings. U.S. District Judge Sara E. Hill of the Northern District of Oklahoma ruled Oct. 1 that the warrantless historical ALPR query violated the Fourth Amendment, branded the systems “a type of indiscriminate mass surveillance,” and suppressed the plate data plus everything that followed — including alleged methamphetamine found in the car.

The opinion in United States v. Melisa Susan Kyle (Case No. 26-CR-00189-SEH) sits on a public docket and was covered Oct. 2–3 by TechCrunch, The Washington Post, and CBS12, which posted the PDF. It is a single-district suppression order, not binding nationwide precedent. Other Oklahoma federal courts have previously upheld ALPR use; Hill explicitly parted company with them.

Fifty-plus hits on a California plate

Tulsa County Deputy Sheriff Freddie Alaniz, a CLEET-certified narcotics K-9 officer and former DEA task-force officer, was parked beside a highway when a Mazda SUV with a California plate rolled past, Hill’s opinion recounts. His patrol car’s plate camera logged the tag. He followed for no apparent reason other than the out-of-state plate, then ran the number through Flock and VehicleManager. The reasons he typed into those systems: “traffic violation” and “investigation.” At that moment, Hill found, all he knew was the California plate.

The systems returned more than fifty sightings across multiple states over about thirty days — a short turnaround from the Missouri area toward the California/Arizona border and back. Alaniz later stopped the Mazda for following another vehicle too closely, an Oklahoma traffic offense Hill held was objectively justified. He returned Melisa Susan Kyle’s license with a written warning, then detained her for a dog sniff after she refused a consent search. Officers searched the vehicle after the dog alerted; prosecutors later alleged a large quantity of meth. Those are the government’s allegations in a criminal case. Hill never reached a jury verdict on the drugs. She threw the evidence out.

Hill granted Kyle’s motion to suppress on two independent grounds that matter for every agency still treating Flock as a plain-view free-for-all. First, once Alaniz handed back the license, the traffic mission was over; extending the stop for a drug investigation required reasonable suspicion he did not have under a totality-of-the-circumstances review. Second — and the holding that will travel farther than one Tulsa traffic stop — the historical ALPR search itself was an unconstitutional warrantless search of Kyle’s reasonable expectation of privacy in “the whole of [her] physical movements.”

Not a beeper. A dragnet.

Prosecutors argued plates on public roads sit in plain view and cite United States v. Knotts, the 1983 Supreme Court beeper case. Hill read Knotts against Carpenter v. United States and this year’s Chatrie geofence decision: society does not accept law enforcement “indiscriminately and passively catalog[ing] your whereabouts over an extended period of time and then use that information for any purpose whenever convenient.”

“This is a type of indiscriminate mass surveillance,” Hill wrote. “It is not targeted on a single individual, as in [Carpenter]. It is a tool that collects information about all vehicles that pass by any network-connected camera at all times, and it serves up the information to law enforcement on demand.”

Because the ALPR query lacked a warrant and probable cause, and because it had a nexus to the stop that followed, Hill suppressed all evidence obtained after Alaniz initiated the Flock/VehicleManager search as fruit of the poisonous tree. The government identified no exclusionary-rule exception that saved the case.

Indiana already keeps the same kind of ledger

Hoosiers are not watching a distant Oklahoma curiosity. On Sept. 28 at the Statehouse, Gov. Mike Braun told reporters the General Assembly should debate automatic plate-reader limits when it returns in January, framing the fight as bipartisan civil liberties, WRTV reported. He still refuses to disarm police of hardware he calls valuable for real investigations. Axios Indianapolis reported Oct. 2 that House Roads chair Jim Pressel of Rolling Prairie is preparing his own ALPR bill, while Eyes Off Indiana presses for one-week deletion, two-year search logs, and a public audit portal. The Indianapolis Star’s same-day Hamilton County tally put more than 23,000 Flock plate queries on the books since January 2023.

Nationally, Sens. Bernie Sanders and Jeff Merkley and Rep. Alexandria Ocasio-Cortez dropped the Ban Flock Act on Oct. 2 — a federal grant cutoff the Hoosier Enquirer covered the same night. Hill’s order is a different instrument: a Fourth Amendment suppression grounded in Carpenter and Chatrie, not a funding bill from Congress’s furthest-left corner. Conservatives who distrust both dragnet policing and socialist-authored grant kill switches can read the same fact pattern: a deputy typed a plate into a nationwide camera network with no warrant, and a federal judge said the Constitution still applies on the highway.

The Tulsa docket does not rewrite Indiana statutes or IMPD policy tonight. It does put a named Article III judge on record that historical Flock queries can be Fourth Amendment searches — and that “California plate” is not probable cause. Appeal, circuit splits, and any Supreme Court grant will decide how far that travels. Until then, every Indiana agency still running plate histories without a warrant is operating under a legal theory Hill just rejected in open court.

Reporting: Opinion and Order, United States v. Melisa Susan Kyle, N.D. Okla., Oct. 1, 2026 (CBS12 PDF); TechCrunch, Oct. 3, 2026; The Washington Post, Oct. 2, 2026; WRTV, Sept. 28, 2026; Axios Indianapolis, Oct. 2, 2026; Indianapolis Star, Oct. 2, 2026; Hoosier Enquirer Ban Flock Act coverage, Oct. 2, 2026.

Written by Hoosiers, for Hoosiers.