Those who were suspected the most turned out to be peaceful, because peaceful players don't play "like that," which is strange, isn't it? It turns out that anyone can be peaceful, and accusations like "peaceful players don't play like that, they're not even involved, they come and go – they're part of the junta" can be ignored.
Why wasn't Arandor punished for the false lead, by the way? I haven't been following the game closely since my death.
I don't remember why, but everyone rushed to execute him when he was clearly cleared. And they didn't think to kill him at night.