Federal judge in Oklahoma rules a warrantless Flock search was a Fourth Amendment search

What the City and the police have said about the courts

Every place in the City pages and police department records listed here where the City of Altoona or its police department points to a court ruling, the Constitution or a legal standard to support the plate-reader program, in their own words, beside what the October 1 order says on the same point. The order is from a federal trial court in Oklahoma and is not binding in Iowa.

1. City of Altoona, police technology page, "Has ALPR use been tested in court?"

   “Yes. Federal courts have considered Fourth Amendment challenges involving license plate readers, and courts have upheld limited ALPR use involving vehicles traveling on public roads. For example, in United States v. Porter (5th Cir. 2026), a federal appellate court held that the license plate reader use presented in that case did not invade a reasonable expectation of privacy or constitute a Fourth Amendment search.”

   The October 1 order: The order agrees that "nearly every court examining the issue to date has determined that ALPR technology use is not a search" (p. 29), then holds that the search in its own case "was a search under the Fourth Amendment" (p. 37).

2. City of Altoona, police technology page, "Why don't police simply obtain a warrant before searching ALPR?"

   “A search warrant must be supported by probable cause and must particularly describe the place to be searched and the person or thing to be seized. At this early stage, investigators may not yet have a particular person, plate, vehicle or private place that could be identified in a warrant.”

   The October 1 order: "That search was not supported by probable cause, and it was done without a warrant in violation of [the defendant's] Fourth Amendment rights" (p. 37).

3. City of Altoona, police technology page, retention

   “Under Iowa law, a captured registration plate image and accompanying data must be permanently deleted no later than 30 days after capture.”

   The October 1 order: The deputy "had access to at least 30 days' worth of vehicle location information in many states" (p. 2), and the court held that searching that history was a Fourth Amendment search (p. 37).

4. Altoona Police Department, ALPR white paper, February 12, 2024, page 1

   “ALPR use has been tested over and over through the State and Federal court systems, which have determined that ALPR usage does not violate citizens' Constitutional rights. It has been determined that: There is no expectation of privacy on a license plate (United States v. Diaz Castaneda, United States v. Wilcox, State v. Chambers).”

   The October 1 order: "Neither the Tenth Circuit nor the Supreme Court have decided whether law enforcement's use of ALPR technology is a search for Fourth Amendment purposes" (p. 29). The plate-reader search "intruded on her reasonable expectation of privacy in the whole of her physical movements" (p. 37).

5. Altoona Police Department, ALPR white paper, February 12, 2024, page 2

   “Scientific enhancement of manual process raises no issues, meaning if a person can stand in a public area and photograph vehicles as they drive by, then automation of that process is no different (United States v. Knotts).”

   The October 1 order: "the Court is concerned that many of these decisions give too much weight to the language in the Supreme Court's decision in United States v. Knotts" (1983) "without adequately accounting for the context of ALPR technology" (p. 30).

6. Altoona Police Department, ALPR white paper, February 12, 2024, conclusion (page 29)

   “The use of ALPR technology by law enforcement has stood up to repeated Constitutional scrutiny, which is supported by case law (see above). ALPR technology use, just as all law enforcement tools, must be used ethically and appropriately as guided by case law, sound policy, and procedures.”

   The October 1 order: The court held that the search of a car's past plate-reader sightings in its case "was a search under the Fourth Amendment" (p. 37).

7. Altoona Police Department, Policy 424 (ALPR), section 424.4(b)

   “An ALPR may be used in conjunction with any routine patrol operation or criminal investigation. Reasonable suspicion or probable cause is not required before using an ALPR.”

   The October 1 order: The search in the court's case "was not supported by probable cause, and it was done without a warrant" (p. 37). The policy covers using an ALPR in general; the order addressed a search of a car's stored location history.

Searched and not found: no court ruling or constitutional argument about the cameras in the City Council minutes, the police department's December 2022 white paper, its three 2022 memos, its records-retention schedule or its 2025 annual report.