I suppose the OIG would have to investigate? However, this is the same guy who said there was no evidence of bias in Crossfire Hurricane on the part of the highly biased 7th floor of the FBI.
I don’t think there is any nexus to the military. DOJ runs the show.
In order for them to greenlight pulling this off in the first place, it's perfectly obvious 1) That the decision had already been made, by everyone who matters; and 2) The normal mechanisms for dispute resolution are not going to be made available by the decisionmakers, because they are not going to change their minds.