Vargas still couldn’t nod. He spoke instead. " Sí. " His jaw and tongue, at least, seemed to be loosening up. His words were clearer now. Some batches of gamma scopolamine have that effect—someone recovering from it might regain control over one hand or another extremity such as a foot, but be unable to move anything else for an hour. Maybe that was why the drug had been for sale on the black market in Aztlan. I just hoped that the "truth serum" side effect really was working.