Pure O or Ocd with tourette Syndrom(syndrome)

My son (14) has a very complicated case of what seems to be Tourettes with Ocd however his OCD seems to be the thing that debilitates him  he seems to fit the Pure O category in most of his OCD problems yet he also shows the outward manifestations for some of them. He Describes mostly cerebral issues that he has called "even out" since he was 5 or 6 and says one side always is "denser" than the other and he can not even them out he is currently on 1.5 mg abilify and has been on risperdol, Klonipin (klonopin) clorazepate and others. he was a straight a student in all the accelerated honors classes untill last year and now seems to have trouble undestanding what for him would have been simplistic concepts in the past, he also has serious memory problems minute to minute similar to antegrade amneasia starting after the risperdol (also the same time he seemed to have his first really bad week and possable "pshycotic type event" and also was on an SSRI that the doctor  thinks may have caused the reaction.  do you have any suggestions and do you think CBT could be of any help? oh yes he also has trouble sleeping and misses about 50 % of school.  plese e mail ***@**** if possable