I would bet anything Hillary knows exactly who, what, where and when about it all. She gleefully stepped up to the public podium to sell the "American guns are going to Mexico" meme and as Sec. State she should be in the know about any operation involving foreign states. If just one e-mail to or from her names the game they are all finished.
We all know she's a slippery one with brains of Jell-0 but will her luck hold out forever? She skated by the skin of her teeth several times while hubby Slick was in office. Just one evidentiary break could finally end her lucky streak.
Likewise, a lucky break finding a memo or e-mail to/from Holder or 0bama could nail them.