There will be quite a few with quite in depth knowledge about what was going on in 60's to 90's in NI in the US. I wouldn't be suprised if paperwork after grandad kicked the bucket is coming to light found by a generation who finds that sort of thing disgusting.
And we're as before Captain O Connel NYPD would have disposed of it, after pulling body's out of rubble for 14 days as a rookie he now documents it and processes it so it can't be lost.