I think that the judges will first ask Why should He be judged, even though they think it might be possible since they are holding trial after all, and Narses is one big MoFa figure to trial. So they might like to judge and put to execution someone that big in the Clan to show the strenght and importance of the Court, also, he was discovered, which is very bad.

In the end it is as has been said by others here, they will want to know what he is being accused of, the crimes are only according to 'does it hurt/benefit the Clan', 'how does this balances power in the Clan', 'is his unlife/death...