Had a friend get a "DUI"...he never blew so he went directly to jail, license suspended for the requisite year, blah blah blah. First thing he did the next day (when we bailed him out) was get a lawyer. Lawyer did "something" and he went to some classes, did some community service, bummed rides for a year and got hired on at XJT. Turns out that refusing to take the breathalyzer was the smarttest thing he ever did. I went to his initial meeting with the lawyer and was impressed. Apparently you cannot find the term "DUI" anywhere on his record. Tell the guy to stop drinking and driving and find a good lawyer.
Everyone makes mistakes. I do not condone D&D but it happens. Learn from it and move on. He was lucky he didn't kill anyone. That thought alone keeps most people from doing it.