on october 21, the family's green plymouth voyager rental car was discovered in an extremely remote part of the park known as anvil canyon by a helicopter search pilot. subsequent inspection found all four of the tires were flat and the wheels damaged, and the car had been driven on them for over . over 200 search and rescue workers performed an extensive search of the area near the car. the search failed to yield any clues to the whereabouts of the family except for a single beer bottle that was discovered under a bush over a mile away from the stranded car.