No one was saying that Mueller was a white hat. He clearly was involved in very bad activities for a long time. Corrupt to the core. People speculated though that he could be a GREY hat mostly because he supposedly was interviewed by President Trump for the position as head of the FBI when it was actually IMPOSSIBLE for him to get that job. People thought MAYBE he had been given a deal for a reduced sentence if he would cooperate with Trump,Q and the PLAN. I think now that he is most likely a black hat but still not 100% sure. Q says we are watching a MOVIE and sometimes a movie has many twists and turns.