Well for what's its worth, I do believe that ABC is certain that trucks is scum.
The little I know of him, I do know this, if he's not already in the mafia team with knowledge of the players, he doesn't feel part of the mafia team. Moreover, he is a prideful player and will try to show that he is capable, hence his trying to nail scum before his end, even after his confession.
So basically, I believe ABC's reaction is genuine. and the duo ABC speaks of sounds as a believable setup for a mafia team.
However, Trucks has made a point very early in the game of saying he had a bad guy's name... meaning that if he's scum, he's very likely a godfather. (and that would fit with the cruelness of having 2 millers on 12 players ^^).
That said, the rod was spoken of at length day one, and I can easily see a slip to stone (which I understood from the initial flavor as being the part of power), so I can't really take that against trucks...Still it's something we'll have to consider after the night's info (no sense in leaving the "recruited SK" alive for a "maybe scum" ^^)
As nen said, there isn't much reason to ponder too much today, however, i won't hammer and let the other few come in and assess the recent events.