Conflict of Interest Defined
The law governing the special counsel (28 CFR 600.7) specifically prohibits Mueller from serving if he has a “conflict of interest.” Even the appearance of a conflict is disallowed.
The same Code of Federal Regulations defines what constitutes a conflict. That is, “a personal relationship with any person substantially involved in the conduct that is the subject of the investigation or prosecution” (28 CFR 45.2). Comey is that person. He was substantially involved in the conversation with President Trump who may be the subject of an obstruction investigation. In fact, the former Director is the only other person involved. There were no witnesses beyond himself.
http://www.foxnews.com/opinion/2017/06/12/gregg-jarrett-are-muller-and-comey-now-acting-in-concert-as-co-special-counsel.html
haha !!