A man who walked in on the armed robbery and physical assault of a convenience store manager in progress Saturday morning battled the offender, struggling with him until help arrived, said Claxton Police Chief Edward Oglesby. Earl Dewayne Brewton, 45, of Pete Hagan Road in Hagan, "broke through the doors" at Food Fresh on North Duval Street in Claxton sometime between 6-7 a.m. and attacked manager Derest McKinnon, age unavailable, with the butt of a 20-gauge shotgun, according to Oglesby and Claxton Police incident reports. Brewton reportedly beat McKinnon in the upper body and head until he was rendered unconscious.