The Jedi were known to have kept prisoners, but did not believe in executing their prisoners. Volfe Karkko, an Anzati Dark Jedi, experienced typical Jedi imprisonment procedures when he was held in a stasis field, a device that only a Jedi could be capable of opening. In this suspended animation, Karkko's mind was left conscious to contemplate the atrocities he had committed, and his lightsaber was left with him to serve as a warning of the consequences of arrogance.