He constantly forgets things, he constantly comes up with the wildest theories, he's often foggy and withdrawn, socially awkward and Always wears the same old coat, he eats junkfood and often seems to be stuck in some kind of mental loop, going over the same trivial little things over and over and over again. He's Always late..let's the whole Los angeles police department and the coronor wait for hours, then he comes up with some lame excuse for why he's late. Then he clumsily wanders around...looking absent minded, starts to make comments on totally unrelated things "oh, those are nice flowers" and so on. I think the cigar is just to hide the smell of what he's realy smoking in that old car of his.