if the godfather does have a kill ability, he's obviously not gonna come out and say it. if there are 2 mafia left and one has a kill ability, we shouldn't worry about that of course because like you said, if there are 2 mafia left, it's gg. if we're missing kills, we need to assume the godfather has some sort of kill ability, that's the only way we can have any sort of effect on the outcome of this game.