I admire the man. He did what everyone should do when there's a problem. The first step is to find a scapegoat, and then throw them under the bus. If you can't do something that simple, then you shouldn't be CEO. If you don't do it well, you shouldn't be CEO. So, this is a good test for him.
I think he should blame someone else too, and make it part of the whole structure of his defense. It can't hurt really. Pyramid lying is difficult, but considering how much money these guys make, I think the stockholders have a right to expect them to be skilled at this type of thing. And again, if he can't lie, or squirm his way out of this with aplomb, maybe he's not the right material to be the CEO.