To chime in, I think accusing racism works against a prosecutor who is targeting a cop, because the Grand Jury then asks themselves if the cop was racist or had a racist goal in mind when shooting the suspect. Since that can't be proven, the investigation is weakened and the charges are often dropped.

Cops need to have the law brought to bear upon them without charges of abstract unprovable things like racism.

If at all possible, it would be great to convene Grand Juries like a double blind study....don't let them know the race of the cop or the suspect and just tell them the facts. But that is wishful thinking.