Kateo, otherwise referred to as "Killer" Kateo, was a Zabrak male who operated as a criminal during the era of the Cold War. One notable act he committed was the massacre of an entire squad of Galactic Republic soldiers, which he carried out armed only with a shiv. He was ultimately captured by the Republic military and sentenced to imprisonment on the prison world of Belsavis, confined within the high-security Belsavis prison. Upon discovering the existence of this prison, the reconstituted Sith Empire initiated an attack with the goal of liberating both Republic prisoners and captured Sith warriors; during this event, Kateo gained his freedom and was subsequently drafted into the Imperial Military.