Walker, Joe Sam Joe Sam Walker, killer of Coed, sued for divorce. Post Feb. 19, 1956 p.la Convicted slayer to take truth serum test. Post Sept. 18, 1957 p.24 Unidentified Denver housewife denies Walker's guilt. Post Oct. 29, 1957 p.1 Girl killing denied in truth drug quiz. Post Oct. 27, 1957 p.1 Plea to be filed for Walker's release. Post May 12, 1958 p.3 c.1