He nods in acknowledgment of the bodies, of Adrasteia's answer (and suggestion). It'd make sense, answer the question of what happened to those people and where the blood here came from. Blood sacrifice, he's heard, about this place. And he's heard, too, in Isaac's story of Corypheus and the breach.

He looks from the bodies, down to the floor glyphs, and up to the dark rift.

"Think they had something to do the gate up there?"

Either opening, or corrupting it. Or, hell, maybe both.