NEW : Grant 's mother calls for stop to riot , CNN affiliate NBC - TV calls . Police say they made 105 arrests ; charges include inciting riot , vandalism . Prosecutor : Office investigating ` ` mental state '' of officer accused in killing . Video shows officers shoot at Grant in back as another officer kneels on him .
NEW : Victim 's mother calls for stop to rioting , CNN affiliate KTVU-TV reports . Police say they made 105 arrests ; charges include inciting riot , vandalism . Prosecutor : Office investigating `` mental state '' of officer accused in killing . Video shows officer shoot Oscar Grant in back as another officer kneels on him .