Supernanny (Jo Frost) would know what to do.
Can't imagine how much you have to endure.
The only thing I can think of is a second evaluation.
Any possibility you can get him committed for a while so the pros can observe him an give you their diagnosis?
As the father of a girl who might be described as "a model child," I can only imagine how distraught you are.
I'm pulling for you.
Do check out some of Jo Frost's books and DVDs or Youtube or whatever she's got. She really is an expert in sorting out all kinds of difficult kids.