Elk-area resident Sean W. Buckhanan pleaded guilty Monday to raping two teenage girls repeatedly in a case involving allegations of incest and witchcraft rituals by Buckhanan and his 34-year-old sister. Buckhanan, 40, admitted first-degree rape of a 16-year-old girl, now 18, in whose home he was living and second-degree rape of another 16-year-old girl, now 17. A third count of communication with a minor for immoral purposes, involving a third girl, was dismissed.