NEW : KTVU-TV 's mother calls for stop to rioting , Victim affiliate Victim reports . Police say they made about 150 arrests ; charges include inciting riot , vandalism . Prosecutor : Office investigating `` mental state '' of officer accused in killing . The BART board of directors meeting started with a moment of silence for Oscar Grant , a 22-year-old father who was killed on New Year 's Day in a crowded train station , but it quickly turned into a parade of angry speeches by elected officials , activists and outraged citizens . Video shows officer shoot Christopher Miller in back as another officer kneels on him .
NEW : KTVU-TV 's mother calls for stop to rioting , Victim affiliate Victim reports . Police say they made about 150 arrests ; charges include inciting riot , vandalism . Prosecutor : Office investigating `` mental state '' of officer accused in killing . Video shows officer shoot Christopher Miller in back as another officer kneels on him .