From public statements I’ve heard Joe DiGenova seems to think that the OIG investigation is broad and will hang people involved with the Steele dossier, the Flynn prosecution, the FISA wiretap, the whole ball of wax. He could be hoping and guessing because there’s no reason to think that the OIG is leaking. But he’s in a better position than most to make an educated guess, former US attorney for Washington DC
Perhaps you heard an early Joe D. interview. The one I heard was from several days ago and Joe only mentioned that the IG report would be trouble for Comey?