 Less than two weeks later, on October 6, William Newell, then ATF's Special Agent in Charge (SAC) of the Phoenix field division, shut down the operation at the behest of William Hoover, ATF's assistant director for the office of field operations.No charges were filed.Newell, who was Phoenix ATF SAC from June 2006 to May 2011, would later play a major role in Operation Fast and Furious.