My lil bro is autistic.
17 years on this earth, teaching him, living with him, learning with him, being with him tells me that no court, no investigation, no institutionalised therapy would be able to understand why or how this guy did what he did.
It also tells me that no incarceration, no punishment, or segregation would recitify anything.
You have to know the guy to know what to do, and i'm 99% sure you just have to talk with him and he'll be ever so remorseful and ashamed and it will never happen again. Quite simply put the only people who can do anything are this guy's family and friends. The government and the rest of society are useless as they just are always unintentionally blind to the specifics and are just inept at communicating.
Put simply when it comes to mental difficulties i've heard some of the most arrogant, dumb, ignorant, hurtful things come from the mouths and minds of those who are supposedly the best educated people in this country.