WE WERE DRIVING DOWN A RURAL ROAD BEGINNING TO SLOW DOWN, WHEN THE CAR DID NOT SLOW DOWN, IT.WENT AT FULLSPEED WHILE HITTING THE BRAKES. THEN HITTING A TREE HEAD ON, CAUSING A FATALITY. I DID NOT.WANT THE CAR DESTROYED, BECAUSE I WANTED A FULL INVESTIGATION PERFORMED ON THE CAUSE AND THE TPS . I ONLY RECEIVED A BLACKBOX INFO WITH LIMITED INFO SHOWING VEHICLE SPEED AT CRASH. THE ONLY THING SLOWING VEHICLE WAS A DITCH AND THE TREE. ALSO DRIVER SIDE BELT CAME UNATTATCHED AS WELL AS MIDDLE PASSENGER. ONLY DRIVER AIR BAG AND ONE.PASSENGER AIRBAG DEPLOYED.