No. There's still no explanation for what's driving people to kill. That's what we're looking into.

[ but he frowns to the question and nods once. ]

Headaches, or sometimes it hurts their prosthetics that Nut & Bolt funded for them. I've been thinking it's because they have some control over them, or at least something embedded in them that forces them to feel pain when they get too close to the truth. Like how a shock collar would work.