"I have been watching the debate about Flock with a little bit of puzzlement," says Andrew Guthrie Ferguson, a law professor at George Washington University.

"Because real-time crime centers have not just ALPR cameras and sensors, but video analytics and drones and essentially a way to create a visual single-pane-of-glass vision of what's going on in a city, with time machine capabilities where you can go back and investigate crime."

Tools like Axon Fusus, which is a leader in this type of software, also pull in footage and data from police body cameras, law enforcement dashcams, 911 dispatch, gunshot detectors and surveillance cameras, including sometimes those of private businesses that opt in.

As Flock battles public scrutiny, other police surveillance companies see an opening

Its use is growing fast. In 2024, the technology news site 404 Media reported that just over 100 law enforcement agencies had deployed Fusus, which was then its own company and was acquired by Axon that year. The number of law enforcement agencies using the tool has more than doubled since then, according to Axon.