There are many things that can cause paranoia in a person. It can be caused by withdrawl from drugs or alcohol. If he is in AA and is abstaining, that could be what is causing it.

I found a site that lists different reasons for paranoia - http://www.wrongdiagnosis.com/sympto...oia/causes.htm

I don't know if they would have the definitive answer for you, but it might help.

(((Herself))) I hope you can find answers and help soon for your son-IL. Prayers for you all for peace and safety.

Hugssss
J