I probably shouldn't start my first political thread, but here goes.
I always get a little uncomfortable with all of the pro-police posts. I'm not anti-police, but I also don't think the "pro-police" posters on here are really thinking about what it means to live in a free country.
Remember, the government agents all of us are most likely to encounter are police. There are way too many Rashomon stories out there when somebody ends up dead. Video helps but there is still a lot of ambiguity. Way too many cases where you're left looking at things and saying "was that really necessary?"
The thing that bothers me is too many people on here seem comfortable taking the police at their word. It isn't conservative to do that. It isn't liberal either. All of us should have a healthy skepticism of the police. On another thread somebody said something about 99.9% or 99.99% of the time the cop being justified. I think most cops are good but I don't trust any group 99.9% of the time. And then you add in unfortunate but good faith fuck ups and it's a real problem.
I heard an interesting story about a woman from northern Idaho going to a black lives matter rally. Obviously she was a fish out of water. I think both she and the black lives matter group trust the police too little and think the system can't be fixed without a radical change. But I think all of the apologists for police that I see on here trust the police too much.
I don't know what the solution is. The only thing I can think of is having groups in other jurisdictions review video and audio from cases where anybody ends up dead. It is too easy for local internal affairs and local DAs to give local police a break. Even the local internal affairs people are investigating their colleagues. It is too easy to say "officer X is a good guy" and let it go. Local DAs have to work with the local police so they also have a conflict of interest.
Maybe it the folks who review be a combination of police in those other jurisdictions, DAs in those other jurisdictions, and citizens. Something like this would cost money but if we're actually serious about being in a free country we need to do something.

The original concept of our republic was a nation of individually empowered citizens in control of a limited (constitutionally constrained) government. The people who started all of this expected (or perhaps, "hoped" would be a better word) that the states and local governments would likewise form limited local governments.
According to the original concept EACH of us holds authority EQUALLY. The surrender of any of that authority to paid enforcers (police) is in direct conflict with the founding concepts of this nation - Except where those enforcers (police) are hired by local or state governments acting under the authority granted by a majority of it's citizens. So, within reasonable limits, giving authority (within statutory limits) to local police to detain, or temporarily constrain the rights of, citizens is allowable.
That police "power" cannot constitutionally apply to the federal government. Allowing the federal government to employ armed enforcers with authority over citizens is a significant breach of the constitutional limits on the reach of federal government. The federal government clearly understood that, up until J Edgar Hoover sought and received authority to arm the FBI to combat illegal liquor sales during Prohibition. To this day, the federal government has unconstitutionally armed several mercenary forces to enforce the will of the government upon citizens (FBI, DEA, SS - secret service, ATF, and more). That ain't right! And on that point, I completely agree with you.
Allowing (very limited) police powers to professional enforcers hired by local governments as a means to promote the general welfare and safety, is both legal and reasonable. Police hired by a town to maintain the peace, defend citizens from illegal acts, and investigate crimes is both reasonable and necessary for the common good.
Your complaint (above) is really about where to restrict the power and authority of these paid enforcers, not in actually whether they should exist. And that question has been asked ever since the first town marshal was hired, and is absolutely still relevant today. Local (and state) governments continue to walk a very confusing and tortured path between citizen's rights and necessary powers that allow their enforcers to do the job they are paid to do.
It doesn't help that police are very human. Some will lie, others will exceed their authority. Some paid enforcers are bullies and others "get off" on ordering people around. The extreme majority of police officers are really good people who do a very difficult job because they believe in the mission and they honestly want to help. I believe that majority (recognized as the, "good guys" by most of us) is the reason people tend to believe the police first.
Honestly, no one has come up with a "solution" to the tightrope of police powers. I doubt anyone will. I am opposed to the excess authority society has granted to police over the past 85 years, but I know I cannot individually oppose that authority on the street and remain alive. OTOH, I do not believe there are very many instances of "racist" police shootings. Racist cops will harass certain drivers, ticket one race more than others, or bother young adults of a certain race while walking down the street. A "racist" cop, will not subject himself (or herself) to criminal prosecution just for the "satisfaction" of killing a stranger who happens to be a different race.
No sane police officer is going to draw his (or her) weapon and fire - unless they sincerely believe their life (or another person's life) is in imminent danger. The officer's perceptions during high stress confrontations can be very wrong, but even under stress, the officer knows that pulling the trigger can be a career killer and may become a criminal charge against them. There is just no room in that crowded, high stress, decision tree for "racist" decisions.
The decision on where to constrain the authority we citizens have given to paid enforcers still remains with us a citizens. (EXCEPT for the federal enforcers who are completely unconstitutional, yet continue to exist.)