Honestly, after the past few pages, I don't think he's the killer anymore, but I KNOW he isn't the tertiary. I'm more of the opinion he's something that wants to be targeted by a killer because it has high odds of killing an enemy. The ONLY reasons a person would defend being the tertiary so hard is if they're the killer, the inquisitor, the vigilante, or a moron.
Guess I'll switch my vote to klocknov. He's voted like every time but doesn't say anything else.