What I would do is irrelevant. I expect officers of the law to conduct themselves in a professional, ethical, and constitutional manner at all times. I expect them to use reasonable judgment at all times, and use appropriate force and no more at all times, and yes I realize there are times when that does indeed call for lethal force. I expect them show restraint when it helps the situation. I expect them to show empathy for those they are to protect. I expect them to think of everybody as innocent until proven guilty in the court of law. I expect the public to not be under a higher standard than them; it should be the opposite. I expect them to willingly take appropriate punishments for their wrongdoing. With more power should come more responsibility not less. I expect them to come forward with any knowledge of wrongdoing that their peers in law enforcement do and fight against those people just as adamantly as they do all the other criminals. If that upsets them as it makes their jobs harder, puts them at more risk, or just inconveniences them they are more than free to find another line of work as they don’t deserve the one they have.
All the people in any organization like that or any pubic office are public servants and thus are subservient to the public, not people with more power than us that can go on power trips when it suits them because they know they can get away with it.
As they should. But some don't live up to that standard. Knowing that, why would you give them a reason to abuse that power? If that's the case?
Again, why I don't talk back to a police officer or otherwise antagonize one - he or she could kill me at that moment if they want to. Sure, if the racial dynamic is right, you'll have whole communities and even the president protesting but it doesn't change the fact that you're dead.
And I'm not saying that's the case with either of these incidents (unjustified) but why be stupid about it? Just follow the narrative, assume the worst and act accordingly.