TL*THE CONTACT OWNS A 2006 KIA SPORTAGE. WHILE DRIVING IN REVERSE DOWNHILL, THE CONTACT'S DAUGHTER APPLIED THE BRAKES AND THE VEHICLE ACCELERATED. SHE APPLIED THE EMERGENCY BRAKE, BUT THE VEHICLE CONTINUED TO ROLL BACKWARDS AT APPROXIMATELY 10 MPH. THE FAILURE OCCURRED WHILE THE VEHICLE WAS STILL SHIFTED IN PARK. THE DRIVER CRASHED INTO A TREE TO AVOID MERGING INTO AN INTERSECTION. ALL OF THE WARNING INDICATOR LIGHTS ILLUMINATED. THE ROAD CONDITIONS WERE DRY. THE PASSENGER SEATED IN THE REAR DRIVER SIDE SEAT SUFFERED A BROKEN NOSE. THE PASSENGER SEATED IN THE REAR PASSENGER SIDE SEAT SUFFERED FACIAL CUTS. NEITHER WERE WEARING SEAT BELTS. THE VEHICLE WAS DESTROYED AND TOWED. A POLICE REPORT WAS FILED. THE CURRENT AND FAILURE MILEAGES WERE 10,000.