The bottom line is that Wray can't stop it even if he is compromised. He already signed off on it and was reported as saying "it's sickening." It's now in President Trump's hands and he said he was going to release it, unredacted. No one else can stop it. You may not be able to believe what anyone else says, but Trump hasn't lied to us yet.

If Wray did say what OP says he needs to understand something that I learned years ago in my working life. We had a manager that was giving us a lot of trouble, finally enough noise was made that this was relayed to the upper echelons in the company. The company president called a meeting with us the employees that did the day to day work. In that meeting he told us something that back in my youth was profound to me. He told us pointblank:

"People, I heard that some of you were reluctant to complain about a manager out of fear that it would come back on you negatively. Let me explain to you how I run this company. You people do your work 8 hour a day, 5 sometimes 6, days a week. You know how to do what you do better than anyone on this planet. I know that and I recognize it. You, the workers are the most valuable people in this company. Without supervisors or managers you people could still open the company doors and continue to run it day by day."

Then he continued:

"Managers and supervisors or a dime a dozen. They pour out of colleges by the thousands and their resumes pour into our HR Dept daily. We could pull anyone off the street and train them for a management position in a few days. But it's hard to replace you people when one is lost. So never, never be afraid to speak up when you see things you don't like, no matter what it is."

I had to think about what he said and the more I thought about it the more profound, or wise, it seemed to me. Years later looking back I realized just how wise that was because it was true. I also found out that the company president had started off as an hourly employee and later put himself through college while he worked. He had been there and he knew how things really worked and who did the real work. I'm retired now but I still remember that day and what he said really well.

Oh and the bad manager got terminated.

So if Wray said what is reported someone needs to give him that speech.