I'm thinking Reynolds is actually a bad guy. He pull one on Sasha, somehow. Our boy Hyce was in his way so he tried to kill him, but even if Hyce didn't die, it makes it look bad like Sasha made the attempt.
That's a first. If you believe any other manga or anime, the Tudent Council runs the school. I always found the amount of authority they claimed to have to be ridiculous.
You never get rid of an inherited disease like this. As long as a carrier exists, it will keep popping up. The best you can do is not have children with anyone who is a carrier, but as generations go by one or two will accidentally mix.
Look up Tay-Sachs disease. See how it affects the Cajun...
I'm not very good at this - how about he show them a video of Hiroshima being bombed and promising it will happen to their city if they ever threaten his child again? He doesn't have to tell them he couldn't do it.