"I don't know," he frowns a little at the thought. That was the thing... they were running on the assumption that Zoom knows Paco to be dead, and the advantage it'd give them, but what if Hartley's right? What if he somehow had reason to suspect he wasn't? " I mean, I won't deny Zoom's obviously a sadist, but...why keep him around if he thinks Paco's dead? This seemed so...targeted. If the reason he had him in the first place is out of the picture, maybe there's another reason he's kept him around."

Things Cisco never thought he'd need to do in his life? Contemplate a serial killer's reasons for anything.