Joe Biden is at the center of a sexual assault fire storm.
He has been accused of sex assault by former staffer Tara Reade.
Reade says she filed a complaint with a personnel office on Capitol Hill around 1993.
CNN says Reade doesn't have a copy of the document.
She doesn't remember where and to whom, specifically, she filed it.
Biden has denied the assault.
He has asked the National Archives and the Secretary of the Senate to find any document and make it public.
