I think that I answered this question once before on this site.While I don't believe they exist, in your scenario I would definitely let him walk. Here's my reasoning: If they really did exist, my money is on the fact that they would possess an intelligence that rivals our own.If they weren't intelligentwe would have evidence that they exist by now. If they're that intelligent, chances are the one you see isn't alone. If you shoot the one that you see, I'd bet you don't get out of the woods alive.
