College kids will be college kids. However, your daughter has had run ins with the law, lower grades ect.... One of the best definitions of alcoholism is continued use despite consequences. She has had consequences and continues her drinking. It sounds like your daughter may be in the beginning stages of alcoholism. They have AA meetings geared towards young people in most major cities. If she doesn't get help these incidents are likely to get worse. Alcoholism always gets worse never better.