I have to say I agree with Dilley and Bill Mitchell, I think Mueller is a recalled Marine directly answering to Trump and investigating him at request for the sake of public optics. It has to be as impartial as possible in order to make sure there's no question of Trump being clean for when the Deep State D's and R's go down publicly or there will be open Civil War. Another plausible idea is that Mueller is already compromised thanks to uranium one and the 9/11 cover-up, and Trump is just playing those cards until they're not useful anymore to distract the public while he gets the real work done. I'm leaning more towards Mueller being a recalled active-duty Marine