After all, if you've already pleaded guilty, you couldn't claim the 5th Amendment to protect yourself later against those charges.

Why not cooperate?
Maybe Mueller-- after Papadopolous-- is saying you won't be absolved on the other counts until we get the good stuff.

Considering how much material was retrieved from Cohen's office plus the tapes, it could be that Cohen has nothing more to offer. It sure sounds like he is pleading to much more than Flynn and the others did.

unless you are cooperating.