Why feel bad for the police. This has been going on for decades. The police is the victim of a system that they themselves helped to create. The system in a way is set up for the police to fail.
They train them to shoot to kill and when they do, well, they go to jail.
There is also an alarming rate of police officer who do not seem to understand the basics of the law they are supposed to enforce. They interact with citizens from a point of view that you must "obey and comply" even if it is not within the law for the person to comply as requested (sounds like the GB of the JWs)
Some police offices behave like Congregation elders with inferiority complex and they can't compute that not everyone who doesn't obey/comply is challenging their authority. Sometimes people don't comply because they don't understand what they have done wrong or why you are stopping them. Some police officers do a bad job of explaining the whys and hows. That said, you have the lunatics who have a death wish.
If you want to fix the problem with policing, you need to take a step back and look at the structure. How many times have you heard a police chief talk about "only a few bad apples" but they do nothing to actively remove the bad apple (Police Union??) until it becomes politically or socially too hot.
Why are they allowed to investigate themselves?
Why does the camera stop working when the police is at fault and they refuse to release the footage to the public. A young girl was recently shot and the police promptly release the footage to show that the victim was at fault. That should be the standard approach to any type of incident that result in shoot at citizens. However, that is not often what happens.
Police are getting a bad rap now because of social media and smartphones which means more people are aware of when things go wrong.