I'm not at all doubting your intuition. The problem with intuition is that it gets clouded when fear creeps in.
I suspect that your intuition tells you that this kid is unhinged/dangerous. This feeling combined with the shit on the news brings about a sense of fear (understandably).
All I'm saying is to try and let that fear go before taking any action from here.
Involving LE could make the whole situation worse (this is a woke world still).
You could withdraw your son from the school but that would impact your son & your relationship with him.
It's a shitty situation but there are no coincidences. This kid has entered your reality to teach you both something.
💚