I don't know a casino that's completely KYC free anymore. freebitco.in used to be one but they even get to them so, they will indeed ask for your papers when the gov wants it from them. Mixers on the other hand weren't doing any KYC for the obvious reasons.
Not only casinos, exchanges started the same way: some Bitcoin enthousiasts created something new, then it quickly grew over their head, and eventually they disappeared or matured. Bitcoin is growing up, and growing up comes with regulation.
and just like that crypto dies.
You can submit your post for the
Bitcoin Obituaries 
I guess that the FIOD have known that already longer what they will be doing , and dont know if that Account is legit or not.
So as long that there is not a notice on there official Website that this Account belongs to them i have my doubts.
Their number is on their website. You can ask them

What wins has the Bitcoin community had over the government?
Bitcoin still exists! That's the biggest win, and it's still growing in popularity. No government can stop it.