Inside Flock system of metro Atlanta police department: What they say it does, doesn’t do

Police are using various surveillance tools, including automated license plate readers. These devices capture still images of vehicles and can trigger alerts. A demonstration of the system showed how officers use it to track vehicles.

The system has been the subject of a debate about safety and privacy. Further details about the system and its use are available.

A police sergeant explained how the system works, using an example of a vehicle that had been detected by multiple cameras.