Holistic Drug Rehab

It took years for my mother to admit she had a a drug habit. Her addiction caused much pain and sorrow in our family and childhood was not very pleasant for me. As I got older and figured out that my mother was actually suffering from a a drug habit I decided to find help for her. After doing some research on outpatient addiction treatment I decided to have an intervention done on my mother. My mother went into outpatient addiction treatment two years ago and today she is the mother I always wanted her to be.

My sons father suffers from drug and alcohol problems and I don't want my son around him until he gets help through an 12 step support groups center. I fear that he will abuse my child or even worse while he is high. Drug and alcohol problems I've heard makes people act violent, is this true? How can I make sure my ex gets help through an 12 step support groups center and be sure he is actually cured from this horrible fate he has found himself in?