DRIVING 69 MPH CAR WENT UP ONTO BAR DITCH AND TRAVELED IN A VEY STRAIGHT LINE FOR A QUARTER OF A MILE HITTING A TREE RESULTING IN MAJOR INJURIES TO MY BROTHER WHO WAS THE DRIVER AND KILLING MY DAD PASSENGER MAJOR BLUNT FORCE TRAUMA TO THE HEAD. ALL MY BROTHER REMEMBERS IS THE CARS SIDE CURTIAN AIRBAG HITTING HIM IN THE HEAD. DURING THE TRAVEL FOR 1/4 MILE ON BAR DITCH THERE ARE NO SIGNS OF OVER CORRECTING OR BRAKING. WITNESS TO THE ACC. STATED HE NEVER SAW BRAKE LIGHTS BEFORE HITTING THE TREE: BEFORE THE CAR WENT OFF ROAD HE HAD BEEN BEHIND MY DADS CAR FOR OVER 20 MILES AND STATED THE CAR MAINTAINED PERFECT DRIVING AND SPEED: MY BROTHER STATED MY DAD WAS ON OVERHEAD PHONE SPEAKER WITH MY COUSIN AND HAD JUST FINISHED CALL THEN REMEMBERS AIRBAG HITTING HIS LEFT SIDE TEMPLE! BOTH OCCUPANTS WERE WEARING SEATBELTS! THE PASSENGER SIDE SHOULDER SAFETY STRAP WEBBING HAD FULLY EXTENDED OUT BEFORE GETTING HUNG IN D-RING. TBS 10010097. DUE TO THE SRS SYSTEM FAILING ON THE PASSENGER SIDE OCCUPANT SAFETY SYSTEM HAD AIDED TO MY DAD HITTING THE WINDSHIELD AND THE PASSENGER SEAT BREAKING RESULTING TO HIS INJURIES BLUNT FORCE TRAUMA TO THE HEAD RESULTING TO HIS DEATH. DRIVER SIDE CURTAIN AIRBAG DEPLOYED HOWEVER DRIVER SIDE SEAT AIRBAG BROKE THROUGH THE STITCHING IT DID NOT FULLY DEPLOY. DRIVER SIDE STEERING COLUMN DID NOT FULLY DEPLOY RESULTING MY BROTHER RECIEVING A BROKEN CLAVICAL BROKEN STERNUM NUMERIOUS BROKEN RIBS DISLOCATING METAL HIP REPLACEMENT AND BENDING METAL HIP PLATE BROKEN R