"Have we got a corpse?" I suppose that's the first question asked in certain types of police procedurals. And, of corpse, if there is one, the next question is "Whodunit?"
Sometimes, however, the evidence is murky; the suspect elusive. Is there more to the story of a man's untimely death or disappearance? Is someone withholding a crucial piece of information which could shed light on the case -- or maybe even exonerate a suspect?