The main reason why I voted to lynch him was because of off-thread things. I already told her those reasons via PM, but I'll explain it all in full detail here. Not that it matters though, since she died, so think of this as a sort of defense :x
I asked his role, as per usual, and she claims Vigilante. OK cool, nothing suspicious there. Later in the day he told me that she is one of the Veterans. By that time I was mildly suspicious on her, because of her claims of two different roles. He said that her reason for claiming Vigilante was to catch the Mafia's attention, which actually is a pretty cool strategy because it could mean that they could be wasting a roleblock / shot on him.
The problem is that I was so concerned by the fact that in Mini Mafia I, when I was scum, I claimed different roles in one day as well. (I said i was townie early game then later said i was DT). I thought that she could have done the same thing. I also have the habit to be "blinded" when I believe dead-set that someone is Mafia. so yeah.