As usual, I would ask the other players to try to think of the mindset of the accused.
If I was scum, as Isaac claims, would I have posted what I did? Even if everything I said was dead-on; that we are engaged in a multi-serial killer, multi group game with godfathers and extra roles galore, if I was in any way anti-town, would I share that information?
Or is it more likely that I wrote a rambling, speculative post- like here ( http://www.readandfindout.com/rpg/messageboard/200611/ ) or a post analyzing the number of players we have like here ( http://www.readandfindout.com/rpg/messageboard/191406/ )
On the flip side, if Isaac was town, would he be acting nearly this aggressively?