In the late 1980s, he cut a prison guard's throat and assaulted another, and was convicted for both and sentenced to two additional terms of nine years to life. He's been housed at Pelican Bay State Prison, California, since 1989, and  was in indefinite solitary confinement in the Secure Housing Unit.
In the late 1980s, he committed violent acts against prison guards, resulting in convictions and lengthy sentences. He was imprisoned at Pelican Bay State Prison, California, and placed in indefinite solitary confinement.