G, are you aware of the 302?
The FBI has a policy of not recording interviews. They rely on a secondary agent to hand write notes from the interview. Which is then turned into the "official" account of any interview, called a 302. And if you, as an interviewee, dispute anything written in the 302, you are subject to prosecution. And, no, I'm not kidding. Go ahead, read it for yourself. And follow all the links in the story. But, grab a bucket to vomit in. You'll get physically sick when you realize how deep this goes, and you'll have a better understanding of 1)why we're never going to get the truth, and 2) why you should NEVER comply with the FBI:
https://www.forbes.com/sites/harveysilverglate/2011/07/27/constructing-truth-the-fbis-nonrecording-policy/#1bbb9642e8a7