This syndicated "Mallard Fillmore" cartoon ran in newspapers nationally. The incident referred to is one where an employee of SuperAmerica convenience stores in Minnesota grabbed a robber whom the employee believed was attacking the cashier. SA fired him because his actions in fighting off the robber violated SA's policies. These situations do arise from time to time and they are difficult for students to understand. Under the "at-will-employment doctrine," employers may fire employees for cause, or for no reason at all, or even for a reason that most people would consider to be a bad reason. Many states have carved out narrow "public policy" exceptions to this rule to protect employees who are engaging in conduct that should be encouraged, rather than discouraged, by society.
I don't have any idea where this employee's claim will end up under Minnesota state law. However, one thing is clear. In order to get the justice that this employee deserves, he will need to get the assistance of a trial lawyer. The cartoon above erroneously attributes the effects of the at-will-employment doctrine to the work of trial lawyers. In fact, trial lawyers would be the ones representing fired employees who are making claims of wrongful discharge against employers who fire them for bad reasons. The effects of the at-will-employment doctrine are the result of corporate lawyers representing large corporations and wealthy employers who prefer to be free from any obligations to employees. At-will-employment promotes reliance on free-market forces in the labor market - forces which result in periodic injustices. It is the trial lawyers who seek justice for the fired employees. This cartoon suffers from a common disability: the "knee-jerk reactionary, blame the trial lawyers for everything" syndrome. I guess it is an example of just one more "error of law" about which students will have to be educated.