Something tells me I'm going to regret even bothering, but I'll bite.
The obvious and plainly indictable one is outing an intelligence agent with non-official cover. If you or I did that, we'd be in some hidden cell somewhere in Leavenworth for treason, and rightfully so. And unless you can honestly say that you knew what Brewster Jennings & Associates was before this thing happened, don't bother trying to say that she was no longer a spook.
To be honest, though, the man was able to keep his dealings right on the cusp of legality, and while it's pretty easy to look at him and say he's a criminal based on a common sense view of his actions, actually proving so would be insanely difficult. Determining which of his actions actually constitute a crime would involve parsing the various nuances of the law and right or wrong with the same skill that he implemented in determining his actions. Not a particularly fun pastime, in my opinion.
I will offer up an idea, though. The majority of politicians in Washington will never be indicted for anything. Yet I think we will all agree that they're almost universally crooks. To assume that all of the acts a person committed in office were legal because none were ever proven to be a crime would be monumentally naive.