Prayers and good thoughts, Onawa,
Remember that these things generally work out the way they are supposed to. IF he loses this job, it is a consequence of HIS actions. For most alcoholics NOT getting a DUI is a matter of dumb luck. That's all it was for me--I certainly deserved to get one.
Don't be surprised if he blames the police, the court system, or even you for this predicament.
Hugs, you'll be OK, no matter what.