My question involves criminal law for the state of: Georgia
My son was arrested for Public Intoxication in a small town North of Atlanta. Its the circumstances that we need assistance with. My son and daughter were at a party at a friend's apartment. My son is of legal age my daughter, no quite. Long story short he lost track of her and when he found her she was passed out. Not knowing why he helped her up and escorted her to a female friend's apartment, in the same complex, where they had arranged for her to spend the night. En-route, she collapsed hitting her head and opening a 2 inch gash in the back of her head. He provide first aid assistance and called an ambulance. When the police showed up the first officer didn't seem like he was going to charge him, but when the Sargent showed up, things changed. He did say he refused to get up and leave his sister un-attended until the paramedics arrived and probably not too politely. He registered a 0.12.
Here's the question. Our daughter, according to medical personnel was ruffied and was also intoxicated. We would like our son to use the defense that he would not have been in a public place had he not been helping his sister. Nor would he had challenged the officer. He does not want to bring his sister (and friends) into the mix. He feels if he brings up his sister they can charge her with underage drinking, (the hospital did blood tests) or his friends with providing alcohol or even drug charges. Should he be more worried about protecting himself and his future? The fine "sounds" reasonable, about $200. Can they charge our daughter after the fact?
Thanks for any help or guidance you can provide?

