Hard to say. There has been a considerable amount of data scrubbing happening, not just by PIs but by government lackeys intimately familiar with all the tricks of the trade for disappearing information.
I've watched as google "disappeared" half a million image hits on "obama birth certificate". Any number of FReepers have seen identical document URLs abruptly return different images with suspicious alterations on key points.
The internet is the ultimate Memory Hole. Worse than even Orwell envisioned, the document doesn't even disappear leaving a suspicious hole. It magically becomes the document Big Bro' needs it to be this week.
One person involved in the passport peeking scandal, Lieutenant Quarles Harris Jr., was murdered. That got abundant press coverage, didn't it?
Somebody somewhere has actual paper and film documentation, what would happen to it?
One historical model is Howard Hughes: For years and years, Hughes Aircraft had a policy that any photo including Howard was to be turned in to the corporate library "for the historical archive".
Every employee dutifully turned in any photos they found cleaning out desks and old filing cabinets, warm and secure in the knowledge that they were doing their bit -no matter how small- to help preserve the history of this great man.
Any image the library received was promptly destroyed.
Ping.