How can we fight this case

You definitely need to hire a lawyer to defend your son.

Need help with a old charge

You should at least speak with an attorney. If you don't have a criminal record you may qualify for a diversion program which, upon successful...

Hire a lawyer to go to court for you. Since you were going over 100 mph an attorney is a good idea.

I received a speeding ticket in Covington ga I asked for a jury trial my case is set for arraignment on tommarow

You need to hire a local lawyer to go to court for you.

What can I do to get my probation straightened out? And what will they do to me?

You need to hire a lawyer to contact your probation officer, and get everything straightened out. This is not something you can do yourself because...

Can I expunge it

No. You cannot expunge theft charges in Georgia except for shoplifting.

What are the usual consequences for this offense, how much should I expect to pay, and how important is it that I hire a lawyer?

I'd hire a lawyer if you don't want this arrest following you around for the rest of your life.

Out of the 117 days how much time will he do with good behavior? Before he can post bond?

He cannot get a bond for a probation violation. Contact the sheriff's department, and ask them how much time he will actually serve. All the jails...

Can they bring a case that he hasn't been arraigned or indicted for in over a year, to help them indict him for the second case?

They can bring charges anytime within the statute of limitations which is 4 years.

So how can I get this fixed to remove the felony from my record

If they took away your First Offender treatment, and adjudicated you guilty, then you cannot expunge/restrict your record.