This is too bad, for Karo, and everyone else. I agree with some other posters, to quit anything one needs to decide that is the route they are going to take. Many just say their going to quit and behave like they might, but never really decide to.
Seems senseless for people to argue about whether or not they've known someone who has been addicted, or whether or not they themselves have really been addicted. The array of substances, level of addiction, loving support of friends and family, and mental ability of people is a spectrum as wide and varied as the East is from the West. Bottom line is it happens to all kinds of people, and all kinds of people can die from it, or walk away from it or do anything in between. Hope Karo is one who can kick it and redeem himself.