Uh, no. The FIB did surveillance of Trump, and Mueller is supposed to be finding charges on an ongoing investigation. FIB legal eagle Baker is of course up to his neck in bad stuff.
If there were some secret investigation, DOJ would not confirm it by calling the secret investigation ‘ongoing’.
Who said anything about a “secret” investigation? You’re making that up. The FBI lawyers confirmed it as an ongoing investigation. I will post the excerpt of the article again (emphasis mine):
...the FBI general counsel present for the interview would not allow Baker to answer a series of questions about topics like surveillance of Trump campaign aides because it is tied to ongoing investigations.
So, there is an ongoing investigation into the “surveillance of Trump campaign aides”.
My question is, who is doing this “ongoing” investigation? You said it was Mueller.