The prisoner was dead. The truth serum that Tia had created, and assured would have no side effects, had caused the sage to enter a permanent state of vegetation, just after he had just barely managed to give Erich another clue.
Because of this, Erich terminated the man and jettisoned his body into space. Where he then told Tia to plot a course to Asuran space where their next target was currently hiding, or at least had been according to his last known whereabouts.
Erich was slightly perturbed that after all the effort he had gone through in order to claim this sage as his prisoner, all he managed to get out of the man was a slight clue about where another of his order may be hiding.
