The search for six-year-old Zachary Bello was growing by the hour, with hundreds and hundreds of volunteers in Saint George, Utah, showing up to help police look for the little boy in the diaper and Sponge Bob Crocs. His medical condition, Fragile X, which causes autistic-like behaviors, was going to make it harder to find him, explained Henry Schmidt, a search and rescue expert, to the search team. Loud noises upset Zachary, and the child might not respond if someone calls out to him.