Despite that, its a dangerous thing to happen. I am aware of how unlikely it is for the current US Government to use the drone offensively, but once you have a massive fleet of drones flying over the US, patrolling "troubling" neighborhoods constantly, the temptation to use those abilities rises significantly.
I hope that Congress takes action to outlaw this practice, but I have little faith it will happen. It seems like everyday the country is falling further into the pit of becoming an authoritarian police state.
Also police helicopters are operated by local/state forces. This is a federal agency which is way out of its jurisdiction.
https://www.stamfordadvocate.com/local/article/Local-police-...
But really, there's little difference between a lot of civilian and light military aircraft. The Bell 206 that your local news station probably flies around was developed as a military helicopter.