When I was an Air Force Lieutenant I had a "Special Duty" assignment, investigating a Secret document that went missing.  The last person to sign it out was a mid-level manager, and I began with an interview with him first.  He had signed it out, made a copy, prepared the copy for courier to another organization (which was allowed, and the copy was received), and he "swore" he replaced the original into the safe, but there was only one signature on the safe (he had opened/closed it only once, and the copier was in another room).  I went down to the copier, rolled it away from the wall, and the original was on the floor between the copier and the wall.  He was reprimanded, just for a Secret-level document.  
 
I got that damn assignment again as a Captain at the Directorate of Nuclear Surety.  Three documents, also Secret, were lost by the Commander's own secretary.  My interview with her did not go so well, she was pissed and didn't want to talk to me.  I later asked the Commander to open his safe, so I could do an inventory, and behind the sliding metal "back" of the bottom file drawer, I found the three Secret documents.  Crumbled up intentionally, and "hidden" (?) behind that divider.  Case closed.  Top secretary at DNS, fired (it was intentional this time).  Again, just for Secret-level docs.  
 
I've worked in SCIFs (Sensitive Compartmentalized Information Facilities) at DNS, at TRW as a civilian (Nuclear Surety again), and as Director of Engineering, Missile Maintenance Group here at Hill.  Those things are were bulletproof, all docs were in high-security safes, in a room with no windows that also was cypher-locked; at least two people had to be in the room at the same time; transferring information in/out also required Two-Man Control; no Internetz connections; a special secure phone land-line that made it really hard to understand; and I swear we spent 25% of the workday just doing classification oversight, checks, self-inspections, admin etc; very, very secure.  All docs were higher than Secret classification.  That the traitor was able to remove boxes of TS-SCI documents from SCIF(s), without anyone knowing or followup inspections making that discovery, this had to be an inside job involving at least three other people.  This makes me sick to my stomach, especially in light of the fact that both the Secret Service, and some senior military, had their phones "coincidentally" wiped during that same time period.  Dammit.
 
 
And this morning a congressman, a repub trump supporter with an eyepatch (Crenshaw?) was interviewed on one of the political shows I try to catch on Sunday mornings.  He was okay with the documents being re-secured, but was adamant that it should've been done differently.  He claimed the trump team had been cooperating with the investigators (they were not), that a written statement from trump's lawyer must've been an oversight (it certainly was not), and that the investigators should've gone thru the courts to demand trump turn over the remaining documents; No No A thousand times NO!!!  Everyone knows that snake is a serial liar with zero regard for the law, or the US, and a court request simply would've been a head's-up to the snake pit to move nine of the boxes to another location, and return one box to the Government.  I've never wanted to beat a former war hero/navy seal with a baseball bat before, but I can't say that after this morning.  Dammit!!