 That same month, ex-US Attorney Burke admitted to leaking sensitive documents about ATF agent and whistleblower Dodson.Senator Grassley expressed concern that the Justice Department was using Burke as a scapegoat to protect higher officials and vowed to continue his probe.On December 2, 2011, the Justice Department formally withdrew its statement of February 4, 2011, denying gunwalking, due to inaccuracies.