There are a couple pieces of info you need before the Sunry trial. Talk to the two guests, convince the Rodian to tell you he planted the medallion and the Pazaak player to reveal the women was a Dark Jedi. If you don't want a dark point, don't use Force Persuade. You can also get the desk clerk to give a phony aliby with a bribe (Dark Side Point). Then talk to Sunry's wife and she reveals an affair between Sunry and the victim.
At trial, Firith Me takes the stand first. Ask if anyone actually saw the murder then ask if the medal found seems obvious. Then reveal Elassa is a dark Jedi. Don't bring up Sunry's disability.
Gluupor testifies, ask if anyone saw the murder, if the medal is obvious and that he planted it. Stop with those questions.
Elora testifies, make sure to bring up the affair before the prosecutor and have her say Sunry was going to end it. Leave it at that. When Sunry testifies, ask where the medal is. Finish by asking if he was ending the affair. Do not bring up Elassa was a spy or Sunry's heroics. Sum up with no one saw the murder and the affair was over.
Do that and you not only win, but the Sith are fined.