Where's your data?
700,000 cops in the United States.
You could hear about a "bad" one on news everyday, and after a year that 365 "bad" officers would still only be .05% (not 5%, 1/20th of 1%) of them. And the news loves to show "bad" cops because it generates them money, even when the evidence later exonerates the cop of bad doing. Anyone who thinks there are no bad cops is naïve- there are bad cops. But anyone who believes that a few bad seeds represents the whole of 700k cops is a sheep, who gives their brain over to the media.
Remember, numerators without denominators is pointless- as I said above, hearing "lots of cops are bad" is stupid unless you divide it by "but wait there are a ton and ton and ton and ton of cops."
Also, most officers never fire a single shot in their entire 30 year career. If you think cop shootings are the norm, you're watching too much TV. In an entire 30 year career, on average less than 5% of cops ever shoot their gun ONCE at someone.
Do your research. Don't be lead by emotion. Be more Vulcan and less Romulan.