Great point about the lack of quotes about whether they existed at the time.
Get an affidavit (of course a Dem partisan signing an affidavit means nothing).
I've just seen so many examples of mis-quoting, and mis-representing quotes. I don't know what she said, which is why I'd like to see the transcript. But it wouldn't surprise me if the transcript contained something like:
Interviewer: "Did Killian keep personal files?"
Interviewee: "Oh yes, he kept personal files"
Then in the article they claim she said that "such documents did exist".