A dispute over mayonnaise led to an employee at Checkers shooting a customer to death outside the fast food joint in Florida, authorities say.

Elijah Mackey, 23, stands accused of first-degree murder in the death of 40-year-old Wesley Robertson, authorities say. According to a probable cause arrest affidavit, deputies with the Osceola County Sheriff’s Office responded shortly after 10 p.m. Wednesday to the Checkers at 5780 W. U.S. 192 in Kissimmee for a shooting.

Paramedics rushed Robertson to a hospital where doctors pronounced him dead.

Love true crime? Sign up for our newsletter, The Law&Crime Docket, to get the latest real-life crime stories delivered right to your inbox.

Witnesses later told detectives Robertson had been complaining to a female employee about his order and requested several times to speak with a manager. One witness told cops the argument was over missing mayonnaise packets, per the affidavit. While Robertson stood at the window, Mackey came around to the front of the building and began arguing with him.

During the spat, witnesses believed Robertson called Mackey a “p—y” or a “b—,” the affidavit said. Mackey allegedly said “oh I am a p—y,?” pulled out a gun and shot Robertson in the chest.

More from Law&Crime: Woman had a stranger shot at a Wendy’s restaurant after arguing over her dog being off-leash: Police

Mackey ran away but returned to grab his backpack before fleeing again. Cops later found Mackey hiding under a stairwell at a nearby hotel. He told deputies he had a gun on him and asked “is dude OK?,” the affidavit said.

Video from the Checkers showed Mackey climbing out of a drive-thru window and him running up to Robertson before shooting him, according to cops.