Lizzy's been acting suspicious as hell for days now. At this point, it's not much of a stretch to assume he's a monster. Vote off the Tyrant Lizzard.
I'm still trying to wrap my head around Lizzard's wacked-out, Bizarro-world logic: you're voting for ZP because he's a monster too? Say what? Casting suspicion on ZP just reeks of desperation (or fungal infection, one of the two).