 An FBI agent bought gas from Swiedarke's station and forced him to make change, of which the bills were identified later by serial numbers as having been a part of the stolen money.The agent later went in to buy a car, to confirm that he had more bills, and while they were negotiating terms, the district attorney, two FBI agents, County Sheriff Zuidmulder, Green Bay police chief H.J.Bere, and several other police officers entered the office and arrested Swiedarke.