>Honey, did you see this? - Apparently, the Police have been beating up negroes like hotcakes!
The special he mentioned this joke was aired in 2000. I bring this up because it highlights that for some people the police haven't been a force of good for a long time, and smartphones and social media are forcing people to confront that fact. There has been many arguments that people have always been making about how the police in this country been over militarized despite have far fewer training than actual soldiers, and these weapons built for use in the middle east are being used against the poor in the US.
IMO, it's not that the police is now more overall a force of "evil", is that there always been systemically corrupt, and you have just been to well off to notice.