Do you have any problem with my write-in? It seems something GENIUS INTELLECT would do to show that she isn't just some simpleton capable of direct solutions, so it should work with our ego...I admit, I am playing the Protectorate and the PRT as being a bit Lawful Stupid so that it'll be more fun to beat on them should you guys ever choose a full-on villain route, but I do have a justification for things turning out like this.
But as it is, Sophia's social worker is still covering for her, the school still thinks Taylor is a troublemaker and Sophia is merely a victim, Armsmaster was called in because he heard that a Ward got zapped, and found the joy-buzzer to prove it, and according to Shadow Stalker and the school staff, Sophia doesn't have a problem with Taylor.
The way Armsmaster sees it, there's nothing really to investigate, and Robotnik!Taylor didn't waste time berating Sophia or protesting her innocence when she was talking to him to make him think there was cause to investigate, because past experience has taught her such things are useless, and there's the fact she really did destroy school property to make a weapon to attack a Ward.
Sophia's on thin ice, of course, since if she has to lie right to Armsmaster's face, she's going to be in trouble.
The moment it comes to their attention that Sophia was our trigger event, she is done for. There is no path were Armsmaster wouldn't immediately ask Sophia what the trigger event in question was, even if we for some reason didn't elaborate when Kid Win gives the customary "Wait, she is your what?!"While yes that could happen she could also just lie and say it wasn't her fault. Trigger events can be done from simple things like lots of stress, so she could get away with saying she just said some mean things to her once. Which would fool the lie detector as well. Saying attempted murder makes them forced to look into the situation because Kid Win atleast will want to know if his team mate tried to kill someone.
But thats just my read on the characters, figuring out how law works in worm makes no sense to begin with as if any of the cannon stuff happened in real life peoples heads would be rolling.