Employment Law Questions? Ask an Employment Lawyer.
South Carolina, like every other U.S. state jurisdiction (except Montana and Puerto Rico) is an "at will" employment jurisdiction. This means that an employer can terminate an employee at any time, for any reason, or for no reason at all.
The only general exception is where the termination is due to unlawful discrimination based on race, color, national origin, religion, sex, age or disability. Since none of these issues are in play, you can terminate the employee. Your reasons can be that the employee disparaged your business interests. That's good enough to avoid liability for unemployment insurance benefits. In short, based on your stated facts, you can terminate the employee without further liability.
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Call the sheriff and have him removed from the premises for criminal trespass, and/or stalking. That's the only useful recourse in this circumstance.
Then, you can sue the former employee for defamation of character/trade libel, and for a permanent injunction to prevent further false statements of fact from being published. Violation of the injunction would subject the former employee to contempt of court, jail time and fines for failure to follow the court orders.
This may seem an unfair imposition on you, but that's how it's done, when someone disparages your business interests.
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