Every autistic interaction I've ever seen with police has ended up with the police making some obvious mistake that made it impossible for the autistic person to react "properly". They always say confusing things, and they bark their orders over and over really fast so you can't think straight and thus can't follow their orders fast enough. You make one "wrong" step and they think it's okay to start touching you, something that makes many autistic folks involuntarily react in ways that can seem violent but often aren't violent at all.