“It turns out when civilians knew they were being recorded, they not the cops behaved better and stop making false accusations.”
They do. I have friends in LAPD. Even when they go on break to Starbucks, Coffee bean or go donut-hunting, the cam is always on.
I told my neighbor we should be able to erase it rather easily.
http://www.instructables.com/id/How-to-Make-an-EMP-Jammer/