You’re assuming there was going to be a trail.
Likelihood of acquittal: ZERO. Some quiet consolations to the defendant like where to serve time if he pleads. You wouldn’t believe the things that go on in plea negotiations of high profile cases. Everything down to who gives the press release and the time of the day of the news conference.
With potential double jeopardy issues at stake, I seriously doubt they arrest him without a solid case of something. And the Feds just don’t lose, even on trumped up cases.