being used against african-americans and the excessive use of force was being used against vulnerable throughout the city and people were being called names and being thrown things at as officers drove by. what you hear, though is that the city of louisville, the metropolitan government there has agreed to make a lot of changes and they've already started making those changes including sending behavior alex pe experts to try to prevent the things you see happening in louisville where confrontations turn very violent. kate? >> very quickly, evan, as we've learned from past experiences when there is an agreement in principle between the police department and the justice department, what will that mean in terms of tracking and making sure that there's change after this? >> well, now this is going to be governed by the courts. a judge will rule on this and