Female employee is terminated for slapping a male employee. The male employee is not disciplined. Is this

Question:

Female employee is terminated for slapping a male employee. The male employee is not disciplined. Is this gender discrimination? Do you know all you need to know? [Gamboa v. American Airlines, 170 Fed. Appx. 610, 2006 U.S. App. LEXIS 3649 (11th Cir. 2006).]