Pepper ~ please watch over your brother very closely if you can...my brother's downward spiral started with DUIs.
I feel that if I would have paid more attention to what was really happening, we might have been able to save him, but by the time we figured it out, it was too late, we had a plan in place, and when my father went to get him, he found Tony dead.
You are right, change has to come from within, and you can't save them from themselves, there are several others here who have lost their loved ones to addiction, it is heartbreaking, as is any death.
PLease take care of yourself and your family.