A fast food employee was gunned down in Tennessee following a heated argument with an irate customer. The Memphis Police Department responded to a call on Monday just after 9:00 p.m. to reports of a shooting at Church’s Chicken, a fast food restaurant on Park Avenue in Orange Mound. It allegedly all started after a woman in a teal compact SUV started arguing with the employee while at the drive-thru window. Shortly after, the employee stepped outside “to get some air” when a shot rang out, according to Fox 13 News. She was rushed to a hospital in critical condition, where she later died, said …