Kanjon Slyke shared a profession with his sibling, who was also a male Human criminal like Kanjon Slyke himself. Both brothers were apprehended by the Galactic Republic during the era of the Cold War and subsequently incarcerated within a Belsavis prison. During his time in prison, Slyke's brother made an attempt to infiltrate the Megasecurity Ward 23, an attempt that ended with him being killed by the ward's defensive measures.