On February 18, 2001, Robert Hanssen’s career as an FBI agent came to an end. His next tour of duty would be served in the federal penal system as inmate #48551-083. Supermax, the notorious Colorado prison housing terrorists and drug lords, would become his home for two decades. Life in prison also means death in prison. Drop us a line: agentofbetrayal@cbsnews.comSee Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.