A retired police officer is sounding the alarm about Flock Safety's sprawling network of license plate readers, warning that the cameras function as a constant law enforcement presence capable of tracking the daily routines of ordinary Americans. The comparison is blunt: deploying Flock cameras across a community, he says, is "like having a cop on every block."
The warning comes from Anthony Diaz, a former police officer turned privacy advocate, who spoke with The U.S. Sun about the reach of Flock Safety's camera system and what it means for Americans who have never been accused of a crime. Diaz now works with the Surveillance Technology Oversight Project (STOP), a New York-based nonprofit that pushes back against government use of surveillance tools.
His central concern is straightforward: Flock cameras do not simply snap photos of license plates tied to active criminal investigations. They photograph every vehicle that passes, building a searchable database of movements that law enforcement can query at will. The result, Diaz argues, is a passive dragnet that captures the habits of millions of people who are not suspects, not under investigation, and not aware their movements are being logged.
Flock Safety, an Atlanta-based company, manufactures solar-powered cameras that cities and police departments install on public roads, often on utility poles or other existing infrastructure. The cameras use automated license plate reader (ALPR) technology to capture images of passing vehicles, recording the plate number, vehicle type, color, and time of day.
That data feeds into a centralized system that law enforcement agencies can search. Officers can look up a specific plate and pull its recent travel history, or they can set alerts so the system flags a vehicle in real time when it passes a camera. Flock markets the technology as a tool for solving crimes, recovering stolen vehicles, and locating missing persons.
The company's footprint is enormous. Flock cameras now operate in more than 5,000 communities across the country, with an estimated 120,000 or more cameras deployed nationwide. The network spans rural towns, suburban neighborhoods, and major cities. In many cases, residents have little or no idea the cameras are there.
Diaz told The U.S. Sun that the sheer density of Flock's camera network creates something qualitatively different from a single traffic camera at an intersection. When cameras sit on enough streets, the system can reconstruct where a person drives, when they leave home, where they shop, where they worship, and when they return. Over time, that data reveals patterns.
"It's like having a cop on every block."
That analogy, Diaz explained, is not meant as a compliment to effective policing. A police officer standing on a corner can observe who comes and goes. Multiply that by hundreds or thousands of cameras feeding a searchable database, and the effect is a level of monitoring that no police department could achieve with human officers alone.
Diaz warned that the data Flock collects does not disappear after a single use. Depending on the agency's retention policy, records of a vehicle's movements can be stored for 30 days, 90 days, or longer. Some agencies have pushed for extended retention windows. That stored history means investigators can look backward in time, reconstructing a person's travel weeks or months after the fact.
The privacy implications extend beyond criminal suspects. Anyone who drives past a Flock camera has their plate logged. That includes people driving to a political rally, a gun shop, a medical appointment, or a lawyer's office. Diaz and other critics argue that this kind of passive, bulk data collection chills the exercise of constitutional rights, even when no individual search occurs.
Diaz is not alone in raising concerns. Flock Safety's rapid expansion has drawn scrutiny from lawmakers on both sides of the aisle. Senator Josh Hawley launched a Senate probe into Flock Safety's camera network, pressing the company on data-sharing practices, retention policies, and the lack of federal oversight governing how local police departments use the system.
The probe reflects a broader unease among conservatives who see mass surveillance technology as incompatible with limited government and Fourth Amendment protections. Traditional law enforcement tools require individualized suspicion. A warrant demands probable cause tied to a specific person or place. Flock cameras, by contrast, collect data on everyone and sort out the targets later.
That tension has played out in state legislatures across the South and Midwest. Red-state lawmakers have introduced bills to restrict or ban Flock cameras, arguing that the technology was adopted too quickly, often without public hearings or meaningful debate. In some jurisdictions, city councils approved Flock contracts on consent agendas with little discussion.
Flock Safety has pushed back against the criticism. The company says its cameras help solve violent crimes, recover abducted children, and locate stolen vehicles. Flock points to case studies in which ALPR data led to arrests in homicides, carjackings, and kidnappings. The company also says it does not sell data to third parties and that law enforcement agencies control their own retention policies.
Critics counter that the technology is not as precise as Flock suggests. License plate readers can misread plates, especially in poor lighting, bad weather, or when plates are dirty or damaged. A single misread character can link an innocent driver to a stolen vehicle or a wanted suspect's car.
The consequences of those errors are not hypothetical. A Missouri woman spent 13 days in jail after a Flock camera misidentified her vehicle, flagging it as connected to criminal activity. She filed a lawsuit alleging that the false match led to her arrest and detention, even though she had no connection to the underlying investigation.
Cases like that one illustrate what Diaz describes as the human cost of automated policing. When officers rely on a camera alert rather than direct observation or traditional investigative work, they may act on bad data with full confidence. The person on the receiving end has no way to know a camera flagged their plate until police lights appear in the rearview mirror.
The legal landscape around license plate readers remains unsettled. The Supreme Court's 2018 decision in Carpenter v. United States held that police need a warrant to access historical cell-site location data, reasoning that long-term tracking of a person's movements constitutes a search under the Fourth Amendment. Privacy advocates argue that ALPR data raises the same constitutional concerns.
Courts have not yet applied Carpenter directly to Flock-style camera networks, and lower courts have reached mixed conclusions about whether license plate data qualifies for Fourth Amendment protection. Some judges have ruled that plates displayed on public roads carry no reasonable expectation of privacy. Others have suggested that aggregated location data, even from public sources, can cross a constitutional line when it reveals intimate details of a person's life.
Diaz argues that the legal framework has not kept pace with the technology. Police departments can deploy Flock cameras without a court order, without legislative authorization in many states, and without notifying the public. The data flows in before any legal challenge can catch up.
That gap between capability and oversight concerns civil liberties groups across the political spectrum. The bipartisan backlash against Flock's camera network has united libertarian-leaning Republicans and progressive Democrats who rarely agree on law enforcement policy but share a suspicion of unchecked government surveillance power.
Much of the action around Flock cameras is playing out at the local level. City councils in several states have voted to ban or suspend Flock contracts after residents raised privacy objections. In other communities, officials have expanded camera deployments, citing drops in property crime or improvements in case clearance rates.
The local nature of these decisions is part of what makes the issue difficult to address. There is no federal law governing ALPR use by local police. No uniform standard dictates how long data can be stored, who can access it, or what safeguards must be in place. Each of the more than 5,000 communities using Flock sets its own rules, if it sets any at all.
Diaz told The U.S. Sun that the patchwork approach leaves Americans with wildly different levels of protection depending on where they live. A driver might pass through three towns on a morning commute, each with its own Flock contract, its own retention policy, and its own rules about data sharing with other agencies. The driver has no practical way to know which cameras logged the trip or how long that record will exist.
Related surveillance battles have surfaced in other contexts. A recent settlement in San Bernardino County required law enforcement to obtain warrants before conducting drone surveillance over private homes, establishing a precedent that some privacy advocates hope will extend to other technologies. Whether courts will impose similar warrant requirements on ALPR networks remains an open question.
Flock Safety maintains that its technology is a force multiplier for understaffed police departments. The company has said that cameras help officers respond faster, identify suspects more accurately, and close cases that might otherwise go cold. Flock also emphasizes that its system is designed to read license plates, not faces, distinguishing it from facial recognition technology that has drawn even sharper criticism.
The company has also pointed to built-in safeguards. Flock says its system includes audit logs that track which officers search the database and why. Agencies can set retention limits, and the company says it encourages shorter retention windows. Flock has also said it supports transparency and has called for clear national standards around ALPR use.
Critics like Diaz acknowledge that the cameras can help solve serious crimes. But he draws a line between targeted use of technology in active investigations and the blanket collection of movement data from an entire population. The question, he says, is not whether the cameras work. The question is whether a free society should tolerate a system that watches everyone to catch a few.
Diaz's framing cuts to the core of the debate. Calling Flock cameras the equivalent of a cop on every block is not a statement about crime reduction. It is a statement about the kind of country Americans want to live in. Cops on every block might reduce crime. They would also transform the relationship between citizens and the state in ways that are difficult to reverse once the infrastructure is in place.
Authorities have not publicly confirmed whether any federal agency has conducted a comprehensive audit of Flock's data-sharing practices across jurisdictions. Investigators will need to determine whether existing local policies provide meaningful limits or merely create the appearance of oversight. Until those questions are answered, the cameras will keep clicking, and the database will keep growing.
When the government can reconstruct where you drove last Tuesday without a warrant, without probable cause, and without telling you, the question is no longer whether the technology is useful. The question is who holds the leash.
