A grand jury deciding there's not enough to bring charges doesn't mean he did nothing wrong.
This part is correct, and it applies to every situation where a prosecutor makes a decision to file or not file criminal charges.
The question is not whether a person did something wrong or not.
The question is whether or not there is
sufficient probable cause to believe a) that a crime was committed, and b) that the person in question committed that crime.
A decision to file charges does NOT mean the person is guilty. A decision not to file charges does NOT mean the person is innocent. The same is true of jury decisions. "Innocent" is not one of the choices a jury has, because it is not required for anyone to prove their innocence. Juries decide "Guilty" or "Not Guilty," nothing more.
You will sometimes see media reports saying no charges are being filed and therefore the person is exonerated. That is absolutely not true. All that happened is a prosecutor decided they didn't have a case that could be
successfully prosecuted.
Police officers have more leeway in what they are allowed to do and what is criminal than the average citizen does.
This is totally and absolutely FALSE. In fact, most of the time police officers are held to a
higher standard than average citizens.
Why? Because they have
specialized training that gives them both
special skills and
special responsibilities.
In a shoot-don't shoot situation, a civilian would be granted an order of magnitude MORE latitude than a police officer -- because the point where
you have no other option than deadly force is reached
much earlier than it would be for me. If you're scared and pull the trigger, you're probably OK because you don't know what else to do. I have a lot of training in avoiding that "no other option" threshold than you do.
Conversely, I also have a great deal more training and experience in
evaluating threats than you do, and
I probably will identify threats much more quickly than you will and much more accurately. So I probably will see threats you don't see. In some cases, that will mean I diffuse them. In other cases, I might use force much earlier than you would and leave you scratching your head. Or...your inability to identify the threat could leave you dead.