Mueller is guilty of “abuse of power.”
Last I checked he was appointed to find Russia collusion.
Yes,only for Russian stuff UNLESS he HAPPENED to run into anything at all that interested him about ANY topic. Please remember that extra part.
Thus, Trump real estate or hotel building or casino or golf resorts could suddenly interest Mueller and he could take another one to two years gathering documents.
Our country allows Mueller to place himself one step higher than God in his judging powers and a little lower than the angels in his morality ( he has none).