That's according to a new poll from the The Associated Press-NORC Center for Public Affairs Research that finds Americans favor significant changes to the countrys criminal justice system. About 4 in 10 white Americans say major changes are needed; 3 in 10 prefer minor changes. To prevent police violence, most Americans also favor requiring all officers to participate in more extensive racial bias training. Peckhold, who favors moderate changes in the criminal justice system, said those changes should be targeted at chipping away at systemic racist behavior. I don't think Americans really understand how police are taught these tactics to begin with, she said.