@Heph:
Well, my theory (a very random guess though) was that Mafia didn't pick me because I was new.
And about MG, well, I don't think Mafia killed him because they knew he was a doc, but rather because he was the easy way out.
Even if I hadn't posted as much as others, I've been following this thread very closely, and I hardly noticed MG, and I assume, Mafia, looking at this, killed him because he was probably gonna be unprotected.