[He takes a moment to tiredly wipe at his eyes.]

I don't know. The truth serum part of that theory was correct—he admitted that. So maybe...

[Setz probably should've questioned why he was convinced of Jacopo's role, but he'd been holding himself back from doing something he'd regret—and so he'd moved on from the subject.]

He approached me with an invitation to cooperate, much like you two. But the way he talked about Jacopo and Izaya's deaths was... off, so I asked if it was him. I suppose he realized that not lying would be a good way to start.