Yes, he should be kept out of the Army, but I hope there is an official diagnosis of bipolar personality disorder that can be used to support your information.

I'd guess it's best to contact the commander of the local recruiting command, rather than the individual recruiter. Recruiters should respond to something like that if contacted, but usually they're under under incredible stress from recruiting quotas, and they don't really usually have the knowledge needed to handle such issues. I'd report it to the local recruiting command, and leave it at that unless it's clear you're getting a brush-off. If your nephew actually gets accepted for enlistment after you've filed a complaint, then go higher in the chain of command.

I spent a long time investigating a problem in a recruiting command in my area, and it was a very interesting situation. Management was placing unreasonable demands on recruiters, and it put thme in a very dificult situation. My findings cost the Department of the Army a lot of money. Since I never really liked the Army when I was an unwilling member, that gave me great satisfaction.

If you need help, contact me privately.

-Joe-
(you can find my phone number in Auburn, California)