After a while they give up the search for you and say things like "Hmm, I guess it was nothing"
While their friend is slumped over the dinner table with an arrow sticking out of their eye...
I know I know, we can't have everything and this game is damn near perfect but... possibly a little oversight on this one?

Or better yet, the enemy with the arrow sticking out of their eye who was fortunate enough not to die goes back to their post and says "Hmm, guess it was nothing..."