It was around 12:00PM ET, give or take 3 mins. I posted it about it at 12:01.
Also please note the testimony from IG Horowitz (a former US Attorney himself) who stated that the US Attorneys, including Holder and his Deputies, ARE EXEMPTED from investigation by the IG.
He said Fast and Furious was NOT fully investigated because of this fact.
Kirk Starts at 47:00 minutes here: http://www.c-span.org/flvPop.aspx?id=10737439944