He is changing seats on the Titanic. You and your parents should try Alanon. Everything he is saying sounds like untruths. We call it quacking here. Lots of people around him are enabling him so he has the money for drugs. He has probably conned the doctors. Sounds like a good time for an intervention. They are conpeople. They lie. He was probably not clean in jail. They have to want it. Alanon will help.