Long Term Drug Rehabs

My sons father suffers from substance abuse and I don't want my son around him until he gets help through an alcohol rehab clinic center. I fear that he will abuse my child or even worse while he is high. Substance abuse I've heard makes people act violent, is this true? How can I make sure my ex gets help through an alcohol rehab clinic center and be sure he is actually cured from this horrible fate he has found himself in?

Prayers are answered everyday through addiction drug rehab treatment that helps save the lives of addicts who are suffering from a drug habit. When my daughter came home from college last year she was in horrible shape due to a drug habit. My husband and I didn't know what to do but we knew we had to do something. We searched the internet and found a counselor who helped us find an addiction drug rehab treatment center that was close to our home. I thought my daughter was going to die but my prayers were answered because there are people who care enough to make it their business to help families find the right kind of help when help is needed.