how can you even try to link the two situations? other than the fact that both had guns. the second man was not shooting at cops, the first one was.
the first is most definitely justified. the guy on the ground, he was already handcuffed and was not a danger at that moment. though he was a danger before the cuffs.
maybe you could actually write about real innocent people for a change instead of always trying to make the black man the victim