Dumb cops. If that happened to a family member I’d track them down later. I have motion-triggered security lights, and video cameras with sound. So my wife would know if they announced a warning or not. Just hope she would be able to hide the camera hard drive so the cops don’t steal it. The lights come on just about every night, mostly racoons and skunks but they might catch killer cops someday.
There are (I think) ways to tune the sensors so they won’t pick up smaller animals, but will still grab larger beings even if they’re moving slow. As to recording, if you have broadband, I suggest setting up a link such that if the cameras go on, the recording server starts a real-time mirror session with someplace off-property. That way you have a “safe” copy of the video recording even if the cops grab the onsite drive. Once the off-site recording stops, it should be easy to have a script launch that makes duplicates of the duplicate. Keep the session on the remote drive, but also burn at least 2-3 copies of it to DVD, and arrange to have at least one mailed to an attorney you have on retainer.
It might seem over-complicated, and it shouldn’t have to be on the citizen to make such extreme preparations, but in the face of the increasingly-unaccountable actions of law enforcement at all levels it is almost a necessity these days.
Auto continuous backup to the cloud.