Was being black the sole reason for being shot? highly doubtly.
Was it part of it? Ofcourse, thousands of factors are.
So is the factor that police officers in the US uses lethal force more likely than let's say, Belgium.
The more factors that encourages lethal force are present, the more likely it will manifest.
It's the roll of the dice.
Did she fuck up? Yes.
Did the police fuck up? Yes.
Both are at blame.