THE TREAD OF THE LEFT REAR TIRE SEPARATED CAUSING THE VEHICLE TO VEER OFF THE ROADWAY, THE DRIVER OVERCORRECTED TO RETURN TO THE ROAD WHICH CAUSED THE VEHICLE TO ROTATE CLOCKWISE, UPON THE VEHICLE SLIDING THE LEFT REAR TIRE BECAME DEFLATED AND THE WHEEL BEGAN TO GOUGE INTO THE ROADWAY CAUSING THE VEHICLE TO OVERTURN SEVERAL TIMES, THE DRIVER SUSTAINED CONTUSIONS AND ABRASIONS TO HIS ARMS AND UPPER TORSO AREA, THE LEFT REAR OCCUPANT WAS EJECTED FROM THE VEHICLE ANS SUSTAINED CONTUSIONS AND ABRASIONS TO HIS HEAD, NECK, ARMS AND LEGS, THE OTHER THREE OCCUPANTS SUSTAINED FATAL INJURIES(ATTORNEY FOR CLIENTS, FLORIDA HIGHWAY PATROL INVESTIGATION, FIRESTONE, NO OTHER TIRE INFO GIVEN)