He is 20 years old . Just joined the navy not long ago, and is supposed to leave for basic in October. I hope this doesn't ruin that.
If memory serves this is going to be a big big problem. It may cost him opportunity to serve. Better call the recruiter and let them know what happened. When I was in any alcohol related offense was really frowned upon. Up to and including discharge from service.
It's been years since I was in. The recruiter should know more.
Sorry man!