The federal government is more or less designed to function by sacrificing pawns over these kinds of controversies without ever addressing the policies, cultures, or root causes that led to those controversies in the first place. And this goes all the way up to the cabinet level. Sacking one federal prosecutor will do nothing. Even sacking Eric Holder wouldn't change anything--I can't remember a single attorney general who was worth a damn and the first one I remember is Janet Reno.