"Still it begs the question, should ANYONE not ACTIVELY threatening or targeting someone with a weapon be executed in less than 45 seconds into any encounter with law enforcement?"
"What can LEO discern about anyone in so little time?"
Whether ANYONE is ACTIVELY threatening or targeting someone with a weapon.
"And please do not ignore the obviously different situation in the same city where a white man FIRED at police and was not executed."
You answered the question yourself they were obviously different situations, and must be judged based on the facts of the individual cases.