Travis was last seen by his father at about 10:30 a.m. on March 10, 1991. His father was repairing some chainsaws near their cabin in Riverside, California. Travis wandered into some bushes to relieve himself. When he did not return after ten minutes, his father went looking for him. He could not find him anywhere. Travis has never been heard from again. The only possible evidence located in the mountains were shoe prints thought to belong to Travis, half a mile from where he was last seen. There were also marks consistent with sliding or dragging, and animal tracks. The tracks were originally thought to be from a mountain lion, but investigators later stated that they probably belonged to a large dog. His case remains unsolved.