Do you remember he was smirking when he asked Hubbell the questions?
As the above-referenced Weekly Standard says, he didn't know what exectly it was, but Chertoff knew he was on to something.
My memory is rather fuzzy but I do remember that. And I was really frustrated when Damato called a halt to it. My husband and I both at the same time said, "The fix is in." That particular incident set the stage for all hearings after that, don't you think?