Right off the bat I'd say Salvo, but both have their arguments and counterarguments. Salvo acted more suspiciously towards the beginning of the game, but didn't stand out the past 36 hours or so. ALC is a nutjob, but there's a lot going against him. Going to add more tomorrow, right now it's probably best if I just go to sleep.
But to be honest, I'm not really able to give an opinion worth a damn in this game after the whole Fred fiasco. Still can't fathom what he was thinking.