My once lovely 16yr old has gone off the rails spectacularly. He is out every night drinking using drugs,won't adhere to any boundaries, is abusive and hostile unless getting his own way. He has stolen several hundred pounds from me and dp over a period of time, he was staying with my parents and took £400 pound over a two week period some of this was euros ready for a holiday. He is verbally and physically aggressive to his younger brother (14) and had on one occasion gone to hit me but I moved. I'm at a loss as to how to keep him from ruining his life. suggestions/advice please!!