Diagnoses of the sort you are making are inappropriate, however, even in our closed lists. None of us are qualified to do so, and even if we were, have had no opportunity to evaluate him in an appropriate way.
I apologize for and retract that (qualifying with the notes that a) my son is high-functioning autistic and so I get a great deal of personal experience with this just about daily, and b) as SlimVirgin noted, this issue in general has been discussed before).
Daniel Case