Australian police are searching for a crocodile believed to have consumed a 12-year-old boy who was swimming with his friends in a billabong in Australia's Kakadu National Park. Another boy was mauled on the arm, but managed to get away. Police have shot two crocodiles dead in their hunt for the boy, but “neither of them had anything in their stomachs," Sgt. Stephen Constable said. The saltwater crocodiles in the area can grow to more than 23 feet long and weigh more than a ton.