Think about it:
1. There would be no avenue for a plea bargain. Mueller would have to go through the whole song and dance of a criminal prosecution, even while knowing full well that the defendant is going to get a presidential pardon -- probably 30 seconds after the closing arguments are made. Donald Trump is the kind of guy who would actually let the whole thing play out this way just to make a spectacle of it.
2. President Trump has the legal authority to declassify a boatload of documents related to Mueller's investigation, and then immediately hand them over to the defense attorneys in the case. Half of the FBI, CIA, NSA and Mueller's own team would be called as witnesses for the defense.
What false statements did Don Jr. make?