out of state supposed felony.

If your son fails to appear in court, a bench warrant for his arrest will be issued.  The authorities may or may not (probably not) pursue him for this.  However, if he is stopped for even a minor traffic infraction this could all turn up.  He would then be taken into custody and face sentencing for his failure to appear as well as the original charge.

Additionally, his criminal record will have an effect on any future employment; a background check will show this.

He really needs to take care of the situation.  An attorney maybe able to get him into some type of "diversion" program (or Georgia's equivalent) which will enable him to later clear his record.  I know $1,500 might seem like a lot of money now but considering the consequences, it would be foolish not to clear this whole thing up ASAP.

Note:  He can see if he qualifies for representation by the Public Defender or Legal Aid. Also, he can contact the local Bar Association in the county where he is to appear; they may have a list of attorneys who will take his case "pro bono" (for free) or at least for a reduced fee based on his income/circumstances.