Also, slander is usually not something you can bring charges against if it deals with a public figure unless it is done with "actual malice" The Supreme Court ruled on this in 1964 in the case New York Times v Sullivan.

Actual malice means that the person making the statement knew the statement to be false, or issued the statement with reckless disregard as to its truth.

I knew those various Business Law courses I had to take in college would come in handy someday