The appendix of the Mule report was largely redacted; in fact, page D-5 was entirely redacted. Each of the sections on that page alone (and there were 5 in total I believe) were redacted due to "harm to ongoing matter" and each referred to a criminal matter that the Mule had referred to other Justice Dept. prosecutors. The ultimate reveal would be to find out that things like Ukrainian corruption are hiding there and waiting to come out ... TBD ;)