umm.... The people who have died at night have been strangled. The wights/others/blahblahs strangle. If we're technically being picky, the wights strangle and the others can actually kill you, while a human could totally also strangle you. But the "go-to" kill move associated with the cold zombie bi-yotches is the strangulation death. Since all the deaths have been strangulation (Except killing of the first wight) we should be assuming that the others/wights are the ones who kill at night. No clue what the human-wolves are doing. Still don't know if they killed sansa that first night or if it was some defensive power. I guess we have to assume they did target the other and they are the ones who killed it, but no other "human type" kills since then? Raises my curiosity a bit.