Flock cameras in Lexington, Kentucky are a network of 125 automated license plate readers operated by the Lexington Police Department across Fayette County.1 The cameras photograph passing vehicles, convert plates into searchable data, and log characteristics like make, color, and body type to help investigators work stolen-vehicle, missing-persons, and violent-crime cases. They do not identify drivers, and they do not write traffic tickets.
What the Cameras Capture
Each camera uses automated license plate recognition to photograph vehicles that pass it and turn the plate image into searchable text. The system also logs broader vehicle attributes through what Flock calls its Vehicle Fingerprint technology, so an investigator can search for a “dark-colored pickup truck” when a witness didn’t catch the plate.
Two limits are worth being clear about. The cameras do not use facial recognition and cannot identify anyone inside a vehicle; searches run on vehicle characteristics, not people. And the hardware is not configured for traffic enforcement. It cannot clock speed, catch a red-light violation, or generate any kind of citation.
Where the Cameras Are
The city publishes a map of all 125 camera locations on its official license plate reader page at lexingtonky.gov. The cameras are concentrated along major roads and high-traffic intersections throughout Fayette County, positioned to capture volume rather than to monitor particular neighborhoods. The map is updated periodically.
How Long Data Is Kept and Who Can See It
Lexington police retain license plate reader data for a maximum of 30 days unless a longer period is required by Kentucky records retention schedules or the data has evidentiary value in an active investigation. After 30 days, non-flagged images are automatically deleted from the Flock system.
Before an officer can search the database, the system requires a documented reason for the query, which creates a reviewable record of every search. The department audits those search logs at least once per quarter to look for unauthorized or suspicious access. Under the department’s data-sharing policy, Flock data is shared only with other law enforcement agencies for legitimate investigative purposes. Flock Safety says it never sells customer data and that its employees cannot access an agency’s database unless specifically asked to troubleshoot a technical issue.
How Alerts Work
The system compares every plate it reads against a “hot list” of vehicles tied to active investigations. When a camera reads a plate that matches the list, it pushes a real-time alert to officers. Hot list entries draw from several sources, including the FBI’s National Crime Information Center, which compiles data on stolen vehicles, wanted persons, missing persons, and protection orders. Agencies must have formal agreements with the FBI to receive NCIC data for use with plate readers, and that data refreshes twice daily.
Amber Alerts for missing children and Silver Alerts for endangered adults can also drive hits. Once a vehicle is flagged, officers can review captures from multiple cameras to piece together its recent direction of travel.
Accuracy and Known Limitations
No license plate reader is perfect. Independent testing by the security research firm IPVM found Flock readers misidentified the state on roughly one in ten plates, and vehicle characteristics like make were also frequently wrong. A misread plate can match a hot list entry that has nothing to do with the car that actually passed the camera.
Temporary paper plates, obscured tags, and poor weather further cut accuracy. A camera that reads “ABC-1234” when the actual plate says “ABC-1284” can generate a false alert and, without verification, lead to a stop of a driver with no connection to any investigation.
The Legal Status of the Cameras
Fourth Amendment
A federal judge recently ruled that Flock camera surveillance does not violate the Fourth Amendment. Plaintiffs represented by the Institute for Justice are appealing. The underlying argument asks whether mass collection of location data from plates is an unreasonable search in light of the Supreme Court’s 2018 decision in Carpenter v. United States, which held that long-term tracking of cell phone location data requires a warrant. Courts have not broadly extended Carpenter’s reasoning to license plate readers.
Stops Based on a Camera Hit Alone
Courts have been clearer on one point. The Ninth Circuit Court of Appeals has ruled that an unverified ALPR alert alone is not enough to justify a traffic stop. Officers must independently confirm the alert before pulling a driver over. That principle is why a misread plate or a stale hot list entry should not, on its own, result in a stop.
Kentucky Legislation
Kentucky’s General Assembly has considered statewide rules for plate reader use. Senate Bill 380, introduced in the 2024 Regular Session, would have required a search warrant before using ALPR data in criminal investigations, limited collection to plate numbers and basic vehicle information, barred tracking individuals without a warrant or exigent circumstances, and required automatic deletion of non-matching data within three minutes. It also specified that a positive ALPR match alone would not amount to reasonable suspicion for a traffic stop. Lexington’s program is currently governed by the police department’s internal policy rather than a Kentucky statute written specifically for license plate readers.
Checking on the Program
The city’s license plate reader page on lexingtonky.gov lists the number of active cameras, links to the department’s written LPR policy, and shows the location map. Officer search activity is subject to the department’s quarterly audits, and the documented-reason requirement for each query creates a reviewable record. Residents with questions can reach the Lexington Police Department through the city’s website.