It's generally pretty easy to tell if someone is a psychopath - unless they're a good actor, and Dallon is just that.

Brendon Urie was an asshole. Plain and simple. He pushed everyone around and acted as if he was the shit. Dallon Weekes was the complete opposite of Brendon Urie. The only thing the two had in common was their love for males, and being loners. Or so they thought, at least.