Storm Raven said:
This is all well and good, but you have the slight problem that the correct legal verdict was reached, even though the verdict was prejudged.
The Order of the Stick actually were guilty of the crime of which they were accused, alveit only through Elan's incompetence.
Edit: Additionally, the beings who pre-judged the trial (Shojo and Roy's Dad) aren't the beings who have the right to judge the trial. If they'd really wanted to be sure, they should have called in those Celestial beings of Law to ask their opinion. Of course they didn't, because they couldn't be sure that said beings would give the convenient result.
It was prejudged with a full review of the evidence (provided by Roy's father, which is presumably accurate), and nothing broght forth at the trial itself changed the information Shojo had on hand before he sent Miko out to retrive the OotS. So, even though it was a "show trial" it was only a "show trial" in the sense that the facts were already known, and the legally correct outcome already known to everyone except for the members of the Sapphire Guard.
The outside observer, though, will always be left with the question: what if something
had come up during the trial that by rights should have changed the verdict? Would the outcome have been the same? Or would justice have been done?
There is no way the outside observer can ever tell. Therefore, there will now always be a doubt as to the effectiveness of the legal process. And that is damaging to the society (or at least the Sapphire Guard).
In a Lawful society (or, order, in the case of the Sapphire Guard) it is vitally important not only that justice be done, but also that it be
seen to be done. Where corruption like this is exposed, and even where the correct verdict results, the corruption must be thoroughly rooted out, or else the house of cards wobbles. Hence, Shojo needed to be removed (although, there again, Miko went about things in the wrong way - Shojo needed to be arrested, tried, and his actions publicly exposed. Once again, justice needs to be seen to be done to restore faith in the system).