LONDON — A man suspected of killing the wife and daughters of a BBC radio sports commentator with a crossbow was being treated in a hospital Thursday after being found injured in a cemetery some 15 miles (22 kilometers) from the scene of the crimes. Police had spent almost a day hunting for Kyle Clifford after the attack on Carol Hunt, 61, and her daughters Hannah, 28 and Louise, 25 at their home in Bushey, northwest of London.