Javert would snoop around... legally. That is, he might seek out the information if he got wind of Iorveth's plans and organizations, and in fact he might even do something if it were asked of him, but mostly it'd be for the public good. He does not trust Iorveth completely, remember.

WITH THIS KINDA FRAMEWORK I am happy to get Javert involved somehow. :D (PS I am still working on our thread, but we've all been busy yadda yadda yadda tag is coming soon)