If an accident happens and they end up on the sidewalk ... well then it's not really anybody's fault. It was an accident.
I'm not sure why you would really want to press criminal charges against somebody who, following a difficult situation on the road, ended up unfortunately damaging someone.
However, if the person is on a crosswalk. Then it's the driver should be charged at least with manslaughter ... unless they're rear-ended or there's some other circumstance out of their control that made them unable to stop.