the son clearly is missing. and the father, police say, has not seen either of his children, shep, in several months. shepard: trace gallagher live in los angeles. updates on that story as they come in. the man the government blames for killing 17 american sailors could now face execution. tonight, allegations of torture are threatening the obama administration s first capital case at gitmo. our catherine herridge has the story live from guantanamo bay. but, first, the heavyweight champ joe frazier, the first man to beat the greatest lost his first fight with cancer last night. joe frazier called it the greatest thing to happen in his life. he spent decades trying to fight his way out of ali s shadow. the pair traded jabs outside the ring with a bitter back and forth that went on for years. so tonight, ali said simply the world has lost a great champion after he learned that his greatest rival smoking joe