Well, it's clear the investigator wanted to get in on the townie alliance, and thus was investigating the people obviously working together.
Edit: Anyways, if you players with roles feel like getting a serious alliance together, I can direct you to the investigator, but we don't want any mafia members posing as townie roles, so I'll be giving the investigator your name, and it'll be up to him about whether or not he wants to include you. Fair enough?
For now, I'm going to un-vote nickmitch It's not for any real reason right now, other than he's gotten pretty far in mafia by staying low-key, and it looks like he's doing the same this time. It reminds me a lot of Sonic mafia: You don't say much, you don't do much, and everyone forgets about you.