I think that Trump eliminated those type of standards for presidential candidates. If he can insist that there are fine people among the alt right then they can hold the torch for the killing of an unarmed man in the street. Their empathy for the victim and anger with the lack of justice that accompanies that level of police violence gets my vote if they are Trump's opponent.
Besides, our current president has told us repeatedly that the DOJ is not to be trusted. This may be one of the instances where he unintentionally told the truth.