People responsible for death said to be familiar with places where remains were found . Morgan Harrington last seen at concert in October , when she was separated from friends . Morgan 's skeletal remains were found on 700-acre land about 10 miles from concert site . Trees , streams , rocks , make land difficult for stranger to negotiate , authorities said .
Person responsible for death said to be familiar with area where remains were found . Morgan Harrington last seen at concert in October , when she was separated from friends . Harrington 's skeletal remains were found on 700-acre farm about 10 miles from concert site . Fences , streams , terrain would make land difficult for stranger to negotiate , authorities say .