Disgraced comedian Bill Cosby was dealt another blow Monday when the U.S. Supreme Court denied review of his appeal in a California defamation case brought by one of Cosby’s alleged rape victims.

The case Cosby v. Dickinson challenged a California Court of Appeal decision that said a defamation lawsuit brought by Janice Dickinson against Cosby and his onetime lawyer Martin Singer of Lavely & Singer could go forward in spite of precedents that protect the speech of lawyers who speak out on behalf of their clients.