JEEP ROLL AWAY WHILE IN PARK. ORIGINAL DRIVER PUT CAR IN PARK AND LET THE CAR SETTLE ON PAWL. AFTER POSITIVE STOP IN PARK, DRIVER APPLIED PARKING BRAKE AND LEFT THE VEHICLE TAKING KEY FOB WITH HER, AND CLOSED DOOR. CAR WAS STILL RUNNING. NEW DRIVER OPENED THE DOOR, ENTERED AND CLOSED DOOR. DRIVER REMOVED PARKING BRAKE AND ATTEMPTED TO MOVE CAR INTO DRIVE. WITHOUT KEY FOB, THIS IS NOT POSSIBLE. CAR REPORTED KEY FOB HAD LEFT THE VEHICLE, AT WHICH TIME THE 2ND DRIVER LEFT THE VEHICLE TO RETRIEVE THE KEY. ONCE LEAVING THE VEHICLE, THE CAR BEGAN TO ROLL BACKWARDS WITHOUT THE DRIVER AND WITH A SOMEONE IN THE PASSENGER SEAT. WHILE ROLLING PASSENGER TRIED TO MOVE SHIFTER INTO PARK, BUT HANDLE WAS FIRMLY IN THE PARK POSITION. CAR ROLLED APPROXIMATELY 300 FEET BEFORE HITTING A HOUSE. POLICE REPORT INDICATES CAR WAS IN PARK AND WITHOUT KEY FOB.