Who is he talking to? Sure sounds like he is in the know about Muller’s deficiencies and exactly what will sink the Muller show trials.
More than that, he probably knows some of his underlings are trying to avoid prison and ratting him out to the investigation going on behind the scenes. Rosenstein and Mueller and Holder probably don't know what is going on, but they get info that something is going on. They are all probably scared S**tless because they know the death penalty could be in their dirty futures.