The review is required by law. They don't get to edit the facts.
They may not be able to edit the "facts" but being able to delay their approval of what is said about them until it becomes ineffective accomplishes the same thing.
There should be no review of Inspector General's reports by those names as wrongdoers in the report itself.
That defeats the purpose of an "inspector's report".
Let the named wrongdoers fight over the facts in a court of law or the media but leave the Inspector General's report alone as written.