Walls was born on April 21, 1960, in Phoenix, Arizona, to Rex Walls and Rose Mary Walls. Walls has two sisters, Lori and Maureen, and one brother, Brian. Walls' family life was rootless, with the family shuttling from Phoenix to California (including a brief stay in the Tenderloin district of San Francisco), to Battle Mountain, Nevada, and to Welch, West Virginia, with periods of homelessness. When they finally landed in Rex's Appalachian hometown of Welch the family lived in a three-room house without plumbing or heat, infested with snakes and rats. 
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