In addition to wax eagle's answerwax eagle's answer, I have one critical suggestion:
Flashback
These events are all in a PC's past. He's going to have to tell them about it sometime. When he does, play moves to the events of the trial. Other forms of fiction use this technique all the time, precisely to flesh out the details of events whose final outcome is known.
For example - the PCs are driving through their home city on the way to a job. They stop for coffee and walk past an ATM. When they're almost to the job, they see flashing lights and start to pull over. The new guy stomps on the driver's foot, pinning the gas down and shouts, "Don't stop! I'm an escaped convict!" A storm of expletives erupts from his coworkers. "Wait, let me explain! It all started about four years ago...." and then give everyone the character sheets for the people they'll be playing in the flashback.
Now they already know how it ends, organically. And they know that nothing they can do can change that. All they can do is flesh out the story and become more invested in the new guy.