I thought about that, but as I was listening to the FR discussion I don't recall any events like that. But I could have easily missed one.
Just a denial can be perjury, if it's false. He denied it. So if it turns out that it's true, then he's in big trouble.
Of course, I don't know how far the Senate wants to take this. And since a lot of these documents are overseas, they may not be able to get their hands on them.