Known by whom? Its been over 2 years and there has still been absolutely no evidence released at all proving this. Claims made by the CIA, the US government or anyone else are proof of nothing, despite what you may think.
>even going as far as creating a show for Julian Assange on the state-backed RT TV Network.
Larry King has a show on RT too, is he an agent of the Russians also? The fact is that RT gives all sorts of people shows - especially people who make us look bad. What is really unfortunate is that so many of those shows are able to make us look bad without lying at all. They just have to give a platform to people (like Chris Hedges) willing to report on the many misdeeds we have, and continue, to commit.
The Russians are no angels and neither are we. The very heart of this case is about freedom of the press and free speech. If we let the government decide who is "legitimate" and who is allowed to publish then there is no "freedom of the press" at all.