-- saywhatagain: That was why Sessions opened up a parallel investigations --
At least that's how the relationship is phrased. It may be that OIG Horowitz and a Sessions-appointed prosecutor are working as a team, with Horowitz doing the investigation and the prosecutor preparing the criminal cases. This way, the legal action is ready to commence the day the report is made public.
I don't see a parallel investigation, that would be inefficient and wasteful.
Another benefit of adding a prosecutor is that a prosecutor (inside -or- SC) may expand investigation to places that are out of Horowitz's scope - such as State Department.
I've speculated that a Special Counsel has been appointed without notice to Congress or the public. This practice is spelled out in DOJ regulations. This would be similar to naming an inside prosecutor, only putting the formal bringing of charges "slightly outside" of the DOJ (using 28 CFR 600 SC regulations). The ready-to-roll timing and scope expansion effects would be the same as with an inside prosecutor.
I will get you more details in a bit. Working on the 1.5 billion dollar E Schmidt campaign program for the queen HRC. The OIG is obligated to refer to criminal prosecution the moment a crime is discovered. I find the explanation in bit. Will finis my other massive rollout. LoL
And, of course, the Federal Government would never be inefficient and wasteful.