No it goes much deeper than that…
"Mueller’s arrival to the FBI came after turbulent times that included the agency's deadly confrontation with Branch Davidians in Waco, Texas; the discovery of FBI agent-turned-Russian-spy Robert Hanssen; and the disclosure of documents withheld from lawyers representing convicted Oklahoma City bomber Timothy McVeigh. By many accounts, Mueller succeeded. When Mueller stepped down as FBI chief in 2013, he was praised by frequent FBI critic Sen. Chuck Grassley, R-Iowa., who called the New York City native “a great American.”"
https://www.usatoday.com/story/news/politics/2017/05/17/7-things-know-robert-mueller-new-special-counsel-russia-investigation/101811990/