[samhw]

That's a long paragraph, but, as far as I can tell, doesn't contain a shred of the evidence or sources I asked for?

The one concrete detail you mention is 'Yuri Noseko' [Nosenko], who seemingly was a defector imprisoned for three years on suspicion of being a spy and then released. I'm not sure how this substantiates any of your claims. It appears to do the opposite.