Zolus was a gang in Butcher Bay Correctional Facility consisting of criminals. They mainly operate in Tower 19. Zolus took over the trafficking business, when the PPP's and Aquilan Gang were on edge, and Zolus and Aquilans had a truce. However Zolus didn't want to traffic into Single Max area. After guards had trouble with the Aquilan gang in single-Max area, Zolus took over the "postal service".