` ` We did not let guns ' walk , ' '' a former ATF field office chief says . Are the other agents lying , or are you lying , ' ' Issa asks Senator Kennedy . A former ATF attache to Washington calls the tactic ` ` insane '' The Justice Department denies it is stonewalling the committee 's investigation .
`` We did not let guns 'walk , ' '' a former ATF field office chief says . Are the other agents lying , or are you lying , Rep. Darrell Issa asks William Newell . A former ATF attache to Mexico calls the tactic `` insane '' The Justice department denies it is stonewalling the committee 's investigation .