It looks like the first people to vote for Smooth last day were Bean, Alistair, Newt, Amine, and Candy, in that order. Since all 11 out of 12 surviving players voted for Smooth, obviously some mafia are are among them, but I doubt the other mafia members would start the bandwagon on him, so I'm more inclined to trust the earliest voters. Conversely, the ones who got on the bandwagon late are more suspicious.