The Supreme elder saw the mocking light in Aster's eyes and she gritted her teeth, she really didn't like the fact that Aster was the one taking the lead, when this whole plan was supposed to lower his popularity allowing them to expulse him from the sect, or at the very least he should lose the position of Holy Son.
The crime of killing a fellow disciple was punishable by the sect in a strange way, if completely solid evidences of the crime were presented by the accuser, the punishment hall would take the matter on their hands.
Resulting in the accused being in the best-case scenario, exiled from the sect or stripped from its cultivation and then exiled, of course there were cases where the evidence was deemed "insufficient" and the accused would be instead imprisoned.
The previous were the most that those with backers could get as their privilege, since go unpunished was impossible in the Myriad Occupation sect.