I was thinking that you might want to get a hair test done on your son to see any heavy metal problems.... I have a suspision that he does.... and that will be easy to take care of....
The most important thing is to act now..... if he is showing szchitophrenic syptoms the sooner you get him stable the better...or he will eventually not be able to understand that you are helping.....
I would strongly recommend taking him to the clinic I told you about earlier.... or to one of the doctors on the link that I posted before......
Nutritional medicine is the best thing for mentally ill patients.... and the sooner the better.....