Is it because there isn't a full IG available?
Is it because the case is so radioactive that Schnedar is considered expendable or because she's a drone that can be trusted no not find anything’s been done wrong by her bosses?
Is because the top IG slot at DoJ has not been filled and so we have an Acting DoJ IG (that can be trusted to do the “right thing” for the DoJ interests, of course)?
MUST protect blueboy at all costs.