What Can I Do For My Brother While He Is In Prison for 10 years?

First off you can't really blame society for him ending up like that all in all it was his choices to take that road. But now, helping him i'd really help get him rehabilitated, but don't get stuck supporting him help him support himself through education therapist, stuff like that. And of course if/when you do establish contact with him if he seems unsafe just cut connections it isn't worth getting yourself dragged in.