Agree with Baker, this is just a theory
Anon, nothing in that document ties Mueller to Acosta. The only thing you have there is "case agent." The text you called out (red rectangle) does zero to support the conclusions you come to in red text at top.
You need A LOT of thick and hearty sauce to back up this wild claim. Props to baker for calling this out as nothing but theory. I'm not saying your theory is wrong, you could be 100% spot on, you just don't have enough to back it up at this point. Keep digging.