IMO, i noticed that you wrote

Well, at least I have been casting my vote using the fairest method - ask the dice and leave it to my shitty luck whenever in doubt, yes.
--tsukune

as a reason you're not a murderer. actually, that reason would make you MORE likely to be the murderer, as the real (smart) murderer would try to make as little enemies as possible thus would say that they voted randomly so as not to hurt anyone's feelings and get other people to reciprocate (ie: vote you back)