No, I require sources for your...claims...that are most likely made up off the top of your head.
You are arguing against a precedent that has long been established in court, backed by scientific data, and upheld at the highest levels of judicial review. Stop while you are ahead...
Beliefs aren't backed up by scientific data. If an officer "believes" someone a threat, they can shoot anyone. They "believe" that someone is a threat. This warrants its justification. Yes that is law. Am I arguing this? No.
Length of establishment is irrelevant.
If someone saw a police officer with a gun and believed them to be a threat, is it legal for them to shoot them? What scientific data states that because someone is law enforcement, they have superior judgement, superior rights, warrant superior trust, warrant superior protection by law?
You really have no idea what I'm arguing, just making things up off the top of your head. I'm aware of both sides of the equation.
No charges should have been brought by the "shooting part." The officer, whether black or white is irrelevant. They acted on their judgement which always protects them.
The entire thing has nothing to do if the guy was black. It has nothing to do with race.
There is no evidence the guy had a gun in his hand. If there is no evidence of the guy having a gun in his hand, there is no evidence he was a threat. An officer "saying" he did is not evidence. Multiple officers saying he did is not evidence. It is faith on words. A picture of a gun laying on the ground is not evidence. It wouldn't be difficult at all to transfer to the gun from the car next to the body. There is no scientific data that suggests law enforcement are worthy of superior trust. Any crime scene investigator doesn't determine it as evidence that a guy has a gun in his hand because he is wearing a holster on his ankle. The cops could have mistook him in a honest mistake for having a gun in his hand, killed him, realized he didn't have a gun on him, realized their reputation and careers would be over, their precinct would look horrid, and covered that part up.
Whether you like it or not, there are so called "experts" and attorneys on the opposite side of the spectrum. Not everyone is blue biased and view them as superior in all that they do.