... If so, I doubt that I have enough. They will not answer my questions, at least.

[...]

Someone else and I have also briefly discussed the incentive behind the role—or specifically, what will happen if we discover all of them. One possibility they brought up was that those in the killing role seek a role that plays an even worse part, and that they must kill them.

Of course, that is mere conjecture, and we have no reason to believe that anything like that is, in fact, the case.