Rock Rapids, Iowa – A Sioux Falls man has been arrested on a warrant for felony theft and felony forgery in Lyon County. According to a criminal complaint filed with the Lyon County Clerk of Court’s Office by the county sheriff’s office, 40-year-old William Buck Smith of Sioux Falls is accused of attempting to cash a check that he allegedly knew was fraudulent at a bank in Lester about 10 months ago He was arrested a warrant on Monday.