Justice Dept . This stoked more controversy . response to Congress says it followed rules in scrutiny of Associated Press . Congress wants to know when attorney general recused himself from leak probe . Comment: NEW : Investigators conducted more than 550 interviews , examined documents .
Justice Dept . response to Congress says it followed rules in scrutiny of Associated Press . Congress wants to know when attorney general recused himself from leak probe . Comment: NEW : Investigators conducted more than 550 interviews , examined documents .