I think he’s using the “innocent” meeting at the airport and now right after the meeting he hears she is getting off. Perfect to show the fix is in....even if you can’t kill them today, make sure you hit them enough that they bleed to death tomorrow.
He is going to have his own credibility to think about at some point. The American people don’t need any more convincing that Hillary is an unethical liar, what is at question is whether the system is rigged. And no a verdict hasn’t been “announced” however much Trump is going to try to play that line.