In Petermann v. International Brotherhood of Teamsters (1959) 174 Cal.App.2d 184, the plaintiff employee sought damages for wrongful discharge from his employment, a discharge which occurred when he was asked to, and refused to, commit perjury on behalf of his employer. Despite the at-will employment, the court imposed liability on the employer, squarely relying on public policy to do so. Noting that perjury was a crime, the Petermann court defined public policy as "'"that principle of law which holds that no citizen can lawfully do that which has a tendency to be injurious to the public or against the public good . . . ."'" ( Id. at p. 188.)