Wasn’t Mulehead in charge of the Boston office during part of the Whitey Bulger era?
“Mueller worked as an assistant U.S. attorney in Boston in the 1980s and was the FBI director when the agency was accused of protecting mob leaders such as Bulger.”
https://www.usatoday.com/story/news/nation/2019/06/08/whitey-bulger-gushed-trump-bashed-mueller-prison-letters/1393394001/