A masked robber who beat his victim was remorseful enough to take the man to the hospital for treatment, but his change of heart didn't last. Within hours the thief was telephoning threats to the victim, who was an acquaintance. The attack happened Monday, according to a report to the Shelby County sheriff by victim Hollis Studdard. Studdard was in his garage when he was struck from behind several times with a tree branch. He then grabbed the limb from his assailant, hit him back and recognized his attacker. "I know it's you, Michael," he told the robber, who pulled off his ski mask and apologized, according to police reports.