A Richland Center man who admitted sexually assaulting an underage girl at least 10 times last year is headed to prison for 25 years. Forty-seven-year-old John Elder was sentenced Tuesday. He pleaded guilty to a charge of sexual assault of a child and causing a child younger than 13 to view a sexual act. Prosecutors say Elder’s girlfriend, 43-year-old Annette M. Winger, made arrangements for him to sexually assault the 12-year-old victim. Winger is scheduled to be sentenced next month.