The Floyd George killing is outrageous as are the many other examples of police violence but people should really learn to not argue with police or resist them.
Most people know that and things turn out much better for them. No one should have to be that careful but that's just the way it is. Don't resist the police and call a lawyer after you are out of the streets and away from the offending cop.
Doing that would save more lives than any protesting will ever accomplish.
Well now that the cops involved are all in line for meaningful punishments, as long as the justice system is consistent in these pursuits perhaps US police will feel compelled to modify their future behaviour and remember the bounds of their authority within the law, which in turn will lead to greater trust in them among the populace. Resisting arrest can be considered a felony too so it's not like the police aren't compensated for the inconvenience if someone chooses to do that, not as if they had to treat the guy like a top 10 FBI wanted serial killer on the loose.