Treasury Department investigators completed but never released a 2011 law enforcement probe of White House economic advisor Austan Goolsbee, The Washington Examiner has learned. The investigation by the Treasury Department Inspector-General for Tax Administration was sparked by Goolsbee's remarks during an Aug. 27, 2010, White House news briefing in which he appeared to possess confidential tax information on Koch Industries, the private conglomerate controlled by the Koch brothers, Charles and David. "So in this country we have partnerships, we have S corps, we have LLCs, we have a series of entities that do not pay corporate income tax. Some of...