The "contract" EEO investigator who customizes their "investigative" report to ATF benefits? If so, there should be no reason. Their "job" was done long before you get to depositions.
When I was deposed, I told the court reporter that I didn't want a copy [and have to pay $$$$$ for it] but I wanted to review it before it was finalized. Of course, ATF counsel made sure the deposition was finalized before I could review it. Counsel claimed that I said I didn't want to review it.
ATF counsel probably slept through the Ethics portion of law school.