POMONA -- A police dog is being hailed a hero for tracking down a mentally-handicapped boy several miles away from his home. On March 10th, a physically and mentally-handicapped 12-year-old boy disappeared from a house in Fontana. Police say the boy had the mental capacity of a 3-year-old. The family called police who immediately turned to their sleuth with a snout -- Willow. "The family had said that the little boy crawled out of his bedroom window and they didn't see which way he went, so to start the search we're like a needle in a haystack," said Officer Joe Hernandez of the Pomona Police Department. The 4 1/2-year-old female bloodhound followed the child's scent for about 5 miles. And about 70-minutes later, the child was found playing in a residential area, completely unharmed. "Willow did all the work, I just did the following," Hernandez said. "You've got to learn to trust your dog." This isn't even close to Willow's record track-down. The pooch once found a missing person 25 miles away.