seventy-five will dutifully tread and retread his story , from start to finish , so many times that he could tell it without thinking , without feeling , to the special agents in charge with the fbi 's phoenix and anchorage field offices , to inspection division agents from the bureau 's headquarters , to border patrol , atf , even a detective from the pima county sheriff 's department , successor to teddy swicegood , who had died of a stroke two and a half years earlier on a golf course in sierra vista .