10/13/2026
Two federal courts. Two plate-reader queries. Opposite answers.
On September 10, a federal court in California held that police queries of license plate reader (ALPR) databases were not a Fourth Amendment search. The queries turned up a few photos of each of two cars. That data, the court said, "could not create 'an all-encompassing record'" of the defendant's whereabouts.
On October 1, a federal court in Oklahoma went the other way. A deputy's warrantless search of plate-reader systems, including Flock, had returned "more than 50 individual records" of a driver's whereabouts "across the country for an entire month." The court called it "a type of indiscriminate mass surveillance" and suppressed the evidence. It also found the traffic stop had been unlawfully extended, a separate ground.
The Oklahoma court acknowledged that, by its own research, "nearly every court examining the issue to date has determined that ALPR technology use is not a search."
Neither ruling binds other courts. Read side by side, though, both put real weight on the query itself: what was asked, and how much history came back.
So the query record matters. If a plate-reader hit is in your case file, someone should be able to say:
Who ran the query, and the reason given.
The plate, the date range, and the networks searched.
How many records came back, and over what period?
Which results were used. Which were set aside.
Investigators who write that down protect the hit. Attorneys who ask for it learn how much weight it can carry.
