A Politico article adds this detail to the unfolding story:

And Boehner is coming under fire from his own members over the decision to replace Doolittle on the House Appropriations Committee with Rep. Ken Calvert (R-Calif.). Calvert himself is facing ethics scrutiny over a land deal in his Southern California district. The Calvert decision underscores the complexity of Boehner’s task, as he tries simultaneously to clean house and keep peace within his own caucus. The California delegation was insistent that the coveted Appropriations seat go to one of their own, following long-standing custom. But the move has upset other GOP members and some conservative bloggers, who fear that Calvert’s alleged problems will feed the party’s reputation for corruption.

Last time I checked, Republican Study Committee member and fiscal conservative John Campbell represented California’s 48th. Also, last time I checked, Campbell wasn’t being investigated by the FBI. It’s not like Boehner didn’t have alternatives.