"I am in blood Stepp'd in so far that, should I wade no more, Returning were as tedious as go o'er: Strange things I have in head, that will to hand;" MACBETH Act III, Scene iv No, I haven't killed anyone. It's writing this darned mystery -- actually it's finishing the thing. I have all the dead victims I need. There's been lots of figuring things out, lots of action, lots of cleverly- woven-in…