They used Eric Holder to handle that.
Steal the documents, deny you stole them and when caught, lie. Then when the lie falls apart, accuse youre enemies of a witch hunt. When that doesn’t work, gleefully announce that you have found the documents, which were placed under some ornaments as protection against water rings. Of course by that time, everyone has moved on to something else.
Wash, rinse and repeat for 25 years.