Justice Dept . response to Associated Press says it followed rules in scrutiny of Congress . Congress wants to know when attorney general recused himself from leak probe . The letter from Kadzik in response to congressional follow-up to Holder 's testimony said Deputy Attorney General James Cole , who approved the subpoenas for the AP records , also had been interviewed by investigators during the leak probe . DOJ sought to find out who told Associated Press about Congress airliner plot . NEW : Investigators conducted 5 interviews , examined documents .
Justice Dept . response to Associated Press says it followed rules in scrutiny of Congress . Congress wants to know when attorney general recused himself from leak probe . DOJ sought to find out who told Associated Press about Congress airliner plot . NEW : Investigators conducted 5 interviews , examined documents .