Hi,
Man oh man do I know this scene all too well. But the difference between me and your son is that I am a repeat offender of driving while revoked. In my expierience, the judge will see that the fines were paid for the original suspension. He will probably give him time to catch up the fees from where you left off paying. He will see that your son has a job and is doing well. He may also advise that your son get an attorney or public defender to reduce the charge of driving while suspended. If he pleads guilty it may be too many points on his license. But most likely he will just have fines and court cost to pay, maybe a bench probation of two years where he cant get into trouble with traffic tickets, and it will be over. Just make sure he knows he has to keep his driving extremely clean for awhile. I have been going thru similar issues but facing felony charges as I have repeated my mistake of driving. So I will say a prayer for your son and hope for a good outcome. Try not to worry about it until it gets here. When is his court date? Let us know how it turns out.