After his release from prison in 1989, Walker moved to San Diego. He found work as a subordinated paralegal. Walker also began writing. In 2003, it was reported that he was writing for six hours a day and had several writing projects in the works, including a cookbook for couples and "A Government Gone Bad, an Historical Account of the Mob and the Machine", focusing on corrupt politicians and outlaws in Illinois. By 2007, he had written several books and published at least three.