Thank you for the information and your question. I am sorry to read about the situation your son is in. The crime he has been charged with is a misdemeanor
and carries with it a minimum fine of not less than $100 nor more than $500, the possibility of jail time of up to 30 days. That said, unless your son has been in trouble before it is highly unlikely that he will receive the maximum sentence
of $500 fine and any jail time. In fact, he may even qualify for pre-trial
intervention which means that if he stays out of trouble for a certain amount of time (the judge will say) that the charge will be completely dismissed and there would be no conviction.
You can see the law he was charged with by going to: http://www.lawserver.com/law/state/south-carolina/sc-code/south_carolina_code_16-17-430
Also, if you want to see how the summary court works and what his rights are, there is an explanation by the Court at: http://www.judicial.state.sc.us/summaryCourtBenchBook/HTML/CriminalH.htm
I highly recommend that he have a criminal
defense attorney represent him in his case, since this is a criminal proceeding and a conviction does carry consequences with it. There is a chance his attorney can get the prosecutor to either drop the case, or at least reach a plea deal to the pre-trial intervention.
Please let me know if you need any clarification. I would be glad to assist you further if I can.