William Newell, Special Agent in charge for the ATF's Phoenix Field Division was in routine email contact with Obama's National Security Staffer Kevin O'Reilly.
When Issa demanded O'Reilly's testimony, Obama transferred him to Hillary's State Department. He was assigned to Iraq last September.
Perhaps O'Reilly will be our John Dean.
If he lives to testify. He might fall out of a helicopter, or get hit by a random bullet.