Austan Goolsbee reminds people that the Inspector General's report on his possible abuse of IRS was never released

The Weekly Standard provides a review here:

In August 2010, Austan Goolsbee, serving at the time as economic adviser to President Obama, told reporters during an anonymous background briefing that Koch Industries doesn't pay corporate income taxes. That statement was made at the same time that top Democrats, including President Obama himself, were demonizing Charles and David Koch, the owners of Koch Industries, for giving money to Tea Party groups. Goolsbee's remark led to a federal investigation, the results of which have never been released. . . .

Now Goolsbee makes a bizarre tweet here:

Without the inspector general's report, we don't know where the White House came up with the claim that Koch Industries doesn't pay corporate income taxes. But earlier this month, Austan Goolsbee offered a new explanation in light of the unfolding IRS scandal. Goolsbee wrote on Twitter:

@joerepublic1 there was no secret info on koch bros. It came fr/heresptimes.com/2003/12/28/Sta… but was a mistake--one of the other Koch bros.
— Austan Goolsbee (@Austan_Goolsbee) May 14, 2013

But then Goolsbee tried to delete the tweet.  Read more here.