Questions and Answers

The following are rebuttals and responses to frequent questions regarding ALPRs and Flock Cameras. This isn't meant to be an exhaustive list or a complete picture, but instead a starting point for common questions that come up with initial questions as to why individuals and communities have objections to how ALPRs are used.

effectiveness vs. police-state risk

Does it reduce crime? The evidence says no.

flock only benefits stolen-vehicle recovery, some investigations no rigorous evidence of crime reduction, purchased at the price of a permanent location dossier on 99.9% innocent drivers.

Is there documented abuse associated with ALPRs? Yes

Are there Constitutional issues with the use of ALPRs and Flock Cameras? Yes plenty

  • Fourth Amendment particularity was written against the general warrant the writ of assistance James Otis attacked in 1761. A networked camera grid that logs everyone and lets any officer query anyone's movements later is a general warrant in digital form. Search first, suspicion later the exact inversion the Founders forbade.
  • Carpenter v. United States (2018): "A person does not surrender all Fourth Amendment protection by venturing into the public sphere." Seven days of location data was a search requiring a warrant.
  • United States v. Jones (2012), Sotomayor concurring: aggregated location data reveals "familial, political, professional, religious, and sexual associations."
  • Commonwealth v. McCarthy (Mass. 2020): accessing historical ALPR data can constitute a search requiring a warrant.
  • Schmidt v. Norfolk: district court ruled for the city (Jan 2026); on appeal; brought by the libertarian Institute for Justice — this is not a left-coded issue.
  • Chilling effects (Neil Richards, Harvard L. Rev.): watched people conform they hesitate before the protest, the clinic, the mosque, the union meeting. That's a First Amendment cost, not just a Fourth.

Do cameras fight crime / help police?

ALPRs do help recover stolen cars. But the only randomized experiment ever run on these systems found no reduction in auto theft or any other crime (NIJ-funded hot-spots study), and California's state auditor found 99.9% of stored images belong to vehicles on no hot list at all. So the actual trade is: marginal stolen-car recovery in exchange for a permanent, searchable record of where every driver goes. The Fourth Amendment was written to require suspicion before the search, not after.

Claim: ALPRs a force multiplier and used for over 20 years. Fact: Flock is a nation-wide network which is novel and are not associated with a reduction in crime.

Plate readers are decades old; what's new is the network. A single camera reading plates is one thing Flock is 80,000+ cameras searchable from anywhere by any subscribing agency. We know because a Texas deputy searched 83,000 of them nationwide to track a woman who had an abortion, including cameras in states where it's legal. And "force multiplier" assumes it multiplies results: the experimental research found no crime reduction. Multiplying a capability without multiplying the safeguards just multiplies the abuse surface.

Claim: ALPRs cameras record license numbers and it's unlikely it is ever seen by a human? Fact: Flock cameras and ALPRs record more than just license plate numbers and are records specifically for people to look at.

Two factual corrections. First, Flock doesn't just record plate numbers — the company markets its "Vehicle Fingerprint": make, model, color, dents, bumper stickers, roof racks. Second, "never seen by a human" is testable, because Flock keeps audit logs — and those logs are how reporters found a Kansas officer who ran 200+ searches on his ex-girlfriend and Norfolk police who queried one driver 526 times in four months. Humans are very much looking. The question is who's watching them.

Claim: Public cameras have helped solve crimes and reduce crimes. If you are doing something wrong then yes, you should be paranoid.

"Solve" and "reduce" are different claims. Solving individual cases: sometimes, yes. Reducing crime: the only randomized trial found no effect. And "only the guilty should worry" assumes the system is only ever pointed at the guilty. It was pointed at a woman who had a legal abortion, at an officer's ex-girlfriend, and at a family in Aurora held at gunpoint over a misread plate. None of them were doing anything wrong. That's why the burden of proof sits on the government, not the citizen: presumption of innocence isn't a reward for good behavior, it's a restraint on power.

Claim: Cell phone data shows my location. Credit card purchases show my location. ALPRs actually find bad guys.

The Supreme Court already answered the phone comparison: in Carpenter v. United States (2018) it held that police getting your phone's location history is a search that requires a warrant — Chief Justice Roberts: "a person does not surrender all Fourth Amendment protection by venturing into the public sphere." Flock is a workaround for exactly that ruling: same location dossier, no warrant, no judge. And "finds bad guys" — 99.9% of the 320 million images LAPD stored were vehicles on no hot list whatsoever. The database is almost entirely people like you.

Nothing to hide, nothing to fear

Claim: Who cares? What are you doing wrong that makes you so concerned?"

That question inverts the founding bargain. The Bill of Rights doesn't ask citizens to justify their privacy; it demands government justify its intrusions — cause first, search second. You don't have to be doing anything wrong to be harmed: ask the officer's ex-girlfriend tracked through 200+ unauthorized ALPR searches, or the Texas woman hunted across 83,000 cameras over a legal abortion. "Wrong" is defined by whoever holds the query box, and that definition changes with administrations. Do you trust every future office-holder with a map of your life?

Claim: Only those that are guilty of something are concerned. Did you know the toll roads record your license plate too?

Concern about general warrants is the founding American position, not a guilty conscience. On toll roads: FasTrak reads plates at fixed toll points for billing, with statutory limits (California law restricts toll-data use). Flock photographs everyone at neighborhood chokepoints, keeps a "vehicle fingerprint," and exposes it to nationwide search by thousands of agencies. If toll cameras bother you too good, be consistent. Scope and purpose are the whole question.

You're already surveilled anyway

Claim: Why care about ALPRs when tracking exists with your phone, car, TV and all your smart devices.

Two differences matter. Consent: you chose the phone and can turn it off, encrypt it, or leave it home. You can choose what devices you use and what tracking is enabled on it. You can't opt out of driving past a government camera at your neighborhood's only exit. Constitutional status: when police want your phone's location history, Carpenter v. United States makes them get a warrant. Flock is engineered to deliver the same dossier warrant-free. "Corporations also track you" is an argument for reining in both it's the reason the Fourth Amendment shouldn't be leveled down to Big Tech's privacy standards.

Claim: Other people see your license plate so what's the big deal?

A passerby sees one plate, once, and forgets. A networked ALPR sees every pass, timestamps it, stores it for weeks, and makes it searchable alongside 80,000 other cameras. In U.S. v. Jones: aggregated location records reveal "familial, political, professional, religious, and sexual associations." Carpenter held the aggregate is what triggers the Fourth Amendment even in public. A thousand fleeting glances don't add up to one permanent file, the camera network is the file.

Claim: Doesn't the Toll Road also track similar information

Partially, and it's regulated differently. Toll ALPRs sit at toll points, exist for billing, and in California operate under statutory restrictions on how the data can be used and shared. Flock cameras sit at residential chokepoints, capture a "vehicle fingerprint" (make, dents, stickers), retain everyone for ~30 days, and are searchable by thousands of outside agencies which is how a Texas deputy reached cameras in other states to track a woman over an abortion.

Claim: Fast Food Drive through track your vehicle. How is this different?

In-N-Out can't arrest you, and its camera watches one window, keeps footage briefly, and isn't federated into a national search network. Flock is queried by armed agents of the state across 80,000+ cameras nationwide. The Bill of Rights binds governments, not burger stands, because only one of them holds a monopoly on force.

Claim: Driving is a privilege not a right. Fact: Free Movement is indeed a right.

Movement is a right. The Supreme Court in Kent v. Dulles (1958): "The right to travel is a part of the 'liberty' of which the citizen cannot be deprived without due process of law." And under the unconstitutional-conditions doctrine, the government can't ration a privilege on the surrender of constitutional rights a driver's license can require an eye exam, not consent to warrantless tracking of everywhere you go, any more than a business license could require waiving your right to a jury. In car-built Orange County, "we may track all drivers" means "we may track everyone."