VEHICLE WAS PUT IN PARK, PASSENGERS GOT OFF, DRIVER TRIED TO OPEN TRUNK USING SIDE TRUNK BUTTON BUT IT DID NOT OPEN. DRIVER WENT TO TRUNK TO OPEN IT MANUALLY BUT IT STILL FAILED TO OPEN. DRIVER WENT IN FRONT TO TRY OPENING THE TRUNK AGAIN AND THAT'S WHEN THE CAR STARTED ROLLING BACK. GEAR WAS STILL IN PARK BUT IT ROLLED BACK. DRIVER TRIED TO MANAGE IT SINCE A BABY WAS IN THE CAR. CAR CRASHED AFTER ROLLING 500 FEET WITH A POLE. DRIVER WHILE TRYING TO MANAGE THE CAR FROM OUTSIDE, SUSTAINED A FRACTURE TO HER TIBIA. NO ONE ELSE WAS INJURED BUT HER. SO IN SPITE OF PUTTING THE CAR IN PARK, THE CAR ROLLED BACK. *TR