City of Clayton, MO
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The Clayton Police Department uses Automated License Plate Reader (ALPR) technology as a proven and widely used tool to enhance public safety. It allows officers to identify suspect vehicles, receive real-time alerts on stolen or wanted vehicles, and respond to potential crimes in progress. In Clayton, this technology has contributed to real investigative results, including reductions in vehicle theft. We also understand that the use of this technology raises thoughtful questions about privacy.
This webpage provides clear information about how the system works, the safeguards in place, and how it is used responsibly in Clayton.
As technology evolves, so do our training, policies, and oversight. We regularly review how these tools are used and make adjustments when needed to ensure they remain aligned with our values and the expectations of the community we serve.
Our commitment is to use this technology in a way that strengthens public safety while maintaining transparency, accountability, and the trust of the community we serve.
Mark J. Smith
Chief of Police
Why Clayton Uses ALPR Technology
Clayton uses ALPR cameras to help keep your city safe by:
- Reducing and preventing crime
- Identifying vehicles associated with criminal activity
- Helping police work with law enforcement in other cities
- Recovering stolen vehicles
- Locating missing or endangered people
Public Safety Impact
ALPR cameras are an important tool for police work today. They help officers identify vehicles linked to crimes, determine whether a car was near a crime scene, and connect related incidents across multiple locations or cities. Police often use ALPR data alongside videos, witness statements, officer observations, and other evidence to solve cases.
Additional examples of how this technology has been used in Clayton investigations are provided in the case summaries section below.
Vehicle Theft Trends in Clayton
Motor vehicle thefts in Clayton have declined significantly in recent years, reaching a 10-year low in 2025. This graph shows the number of reported motor vehicle thefts in Clayton over time. The decline reflects a combination of proactive policing strategies, including the use of ALPR technology. In cooperation with one of our neighborhood associations, the first Flock safety ALPR cameras were implemented in August of 2021. By the end of the year, four Flock cameras were operating in our community.
In 2022, law enforcement agencies across the nation experienced a rise in the theft of Kia and Hyundai vehicles due to a security design flaw. In that same time period, three additional Flock cameras were installed. Through proactive policing and alerts from the Flock system, our officers were able to prevent multiple thefts and reduce the impact on our city. Combined with security software updates by the vehicle manufacturers, the total number of stolen vehicles was greatly reduced in 2023. As shown below, in the following years, the number of vehicles stolen in Clayton has remained lower than our ten-year average.
How the Technology Works
- Cameras capture images of license plates and basic vehicle characteristics
- The system compares the license plate images against police records
- The can alert officers if a vehicle is linked to a crime
- Alerts are generated automatically
- The system is not actively monitored in real time
- Officers review and verify alerts before taking action
- System information is only reviewed when needed to assist an investigation
What Flock Cameras Capture and What They Do Not
- Captures license plates and basic details about the vehicle, like the make, body type, and color
- Does not use facial recognition
- Does not identify drivers or passengers
- Does not record audio
- Does not provide continuous live video surveillance
- Does not access personal information about vehicle owners
Examples of Flock Camera Images
Caption:
Examples of Flock camera images. The system captures rear license plates and vehicle characteristics to assist in investigations. It does not identify drivers or passengers. The photo on the left shows the rear of a white Clayton Police SUV in daylight. The photo on the right shows a rear view of the same vehicle at night on a dark street. Neither the driver nor any occupants can be seen in either image.
Privacy and Civil Liberties Protections
The Clayton Police Department works to keep the community safe while protecting everyone's privacy and rights:
- License plates and vehicle characteristics are captured, not personal identity
- No facial recognition technology is used
- Data is retained for 30 days and then automatically deleted
- This 30-day time frame gives officers time to review reports and follow up on new leads that come in days or weeks after an incident is reported
- Only trained police department employees with a valid law enforcement purpose can see the information
- Every search is logged, audited, and monitored
- Data sharing is limited to approved law enforcement agencies within the State of Missouri
- The department does not automatically share ALPR data with federal agencies
- All sharing decisions are controlled by the department and can be approved, denied, or revoked
Data Access and Accountability
- Clayton Police Department staff must be trained to use the technology correctly. They also must confirm they have read and understand the department’s policies before they are given access to the system.
- Every search must have a valid reason related to police work
- All searches are documented and logged
- Records show who used the system, when, and why
- Unauthorized use may result in discipline or criminal penalties
Transparency
The Clayton Police Department is committed to being transparent about how ALPR cameras are used. The department has clear, written policies for using the system. Oversight is accomplished through frequent audits and reviews. This webpage was developed to help residents understand how the cameras work, how privacy is protected, and how the system helps keep our community safe.
Real-World Results
ALPR cameras help police solve and prevent crimes like car theft and burglary and help find missing people. These investigations sometimes require officers to work with other cities to solve cases. Sharing information helps police spot patterns, connect cases, and find suspect vehicles faster.
Examples of how this technology has been used in Clayton investigations are provided in the case summaries below.
Case Summaries
Modern Policing and Technology
Today, police use a combination of technology, data analysis, and traditional police work to solve crimes. Investigations often use surveillance video, ALPR data, phone records, witness statements, and follow-up work by officers. ALPR cameras are tools that help officers quickly and effectively connect information.
Because crime can cross city lines, police departments work together and share information. ALPR cameras help police identify connections between crimes in different places and solve them faster. For example, a burglary crew, vehicle thief, or fraud suspect may commit offenses in multiple jurisdictions. ALPR systems help identify those connections and improve the speed and effectiveness of investigations. The Clayton Police Department only shares ALPR information with approved law enforcement partners in Missouri. This helps police work together while keeping local control over who sees the information.
