The suspect in an unusual bank robbery in Harrisonville has been arrested in South Dakota, driving the big motorhome that authorites say he bought with the money he stole. The suspect is 75-years-old, traveling with his 65-year-old girlfriend, her son, and her two gandsons. The FBI says they didn’t know how he’d gottenthe RV. Investigators say the man held up the Winterset State Bank in Harrisonville and demanded a $200,000 cashier’s check. The FBI says he paid $166,000 for the motorhome, and had driven to Mount Rushmore in it. Charges are expected to be filed today in Sioux Falls, South Dakota.