The tech entrepreneur Ross McNutt wants to spend three years recording outdoor human movements in a major U.S. city, KMOX news radio reports.

If that sounds too dystopian to be real, you’re behind the times. McNutt, who runs Persistent Surveillance Systems, was inspired by his stint in the Air Force tracking Iraqi insurgents. He tested mass-surveillance technology over Compton, California, in 2012. In 2016, the company flew over Baltimore, feeding information to police for months (without telling city leaders or residents) while demonstrating how the technology works to the FBI and Secret Service.

The goal is noble: to reduce violent crime.

There’s really no telling whether surveillance of this sort has already been conducted over your community as private and government entities experiment with it. If I could afford the hardware, I could legally surveil all of Los Angeles just for kicks.

And now a billionaire donor wants to help Persistent Surveillance Systems to monitor the residents of an entire high-crime municipality for an extended period of time––McNutt told KMOX that it may be Baltimore, St. Louis, or Chicago.

McNutt’s technology is straightforward: A fixed-wing plane outfitted with high-resolution video cameras circles for hours on end, recording everything in large swaths of a city. One can later “rewind” the footage, zoom in anywhere, and see exactly where a person came from before or went after perpetrating a robbery or drive-by shooting … or visiting an AA meeting, a psychiatrist’s office, a gun store, an abortion provider, a battered-women’s shelter, or an HIV clinic. On the day of a protest, participants could be tracked back to their homes.