First, I agree that it is a bad decision in general to attend law school. I noticed that your comment was prefaced by "right now" (or something to that effect), but my theory is that it is a bad decision for the foreseeable future.
Second, I would highly recommend doing something. My best advice is to do something of substance. If that is not feasible, then do something - volunteer, unpaid internship, etc. In this extraordinarily competitive field, and especially if he graduates less than in the top 10% of his class, he better have experience that counts.
Third, I would suggest he get involved in bar associations yesterday, last week, or months ago. Now is it not too late, but good bar associations are priceless. He should begin to participate in committee meetings and attend seminars now in the practice areas that he is interested in.
- Attend bar association meetings and seminars;
- Create cheap (even free), generic business cards with contact information;
- Network at these meetings and seminars;
- Ask questions (even preface your comments, "I am currently in law school . . ."); and
- If you are not in the top of your class after 1L, better get some excellent, substantive experience DURING LAW SCHOOL/AS A LAW STUDENT. The idea of training is over. Even if he does land a job that pays, he will be thrown right in with the wolves.
Fourth, and I know that this advice will be taken, consider leaving law school. This is not as bitter as it sounds. I suspect your brother will be better off by leaving law school. This 1L summer struggle is only going to get worse. I am not pessimistic, but I practice law every day (literally, every day). If he is smart, talented, and disciplined enough to get into law school, he is wasting his skills and intellect in a career that he will probably find unsatisfactory. Law school, and the legal profession, are not good places to find yourself or discover your passions (or even develop skills). It is a merciless and ruthless game. Hopefully, your brother has been warned.