Story By:  Ana Marjanovic, Sub-Editor: Michael Leidig, Agency:  Newsflash

These videos show how a fireman slaps a McDonald’s employee before bursting into the store and shooting him following a row over a discount coupon.

The first video opens with sergeant Paulo Cesar de Souza Albuquerque speaking to McDonald’s employee Mateus Domingues Carvalho, 21, through the drive-through window.

Suddenly, Albuquerque is seen opening his Mercedes door, putting his arm through the window and hitting Mateus, who immediately jabs back.

A second video shows Albuquerque then bursting into the store wielding a handgun as a heavyset man tries but fails to stop him from advancing.

The final video shows Mateus falling to the ground in front of startled onlookers and ends with Albuquerque simply walking away, with his gun still in his hand.

The incident took place in the Taquara neighbourhood of the Brazilian city of Rio de Janeiro in the early hours of Monday, 9th May.

Witnesses later revealed the pair had argued over a discount coupon. The fireman had apparently placed an order at the drive-through window but only said he was entitled to a discount when it was time to pay and not at the beginning of the order like he was meant to.

Following the shooting at point-blank range, Albuquerque fled the scene, while Mateus was promptly taken to hospital by police.

The young man was shot in the stomach and underwent surgery. At the time of reporting, he was still hospitalised at the Hospital Lourenco Jorge, in the Barra da Tijuca neighbourhood, in a stable condition.

Shockingly, he lost his left kidney, said his family.

Albuquerque handed himself into a police station in Taquara on Monday afternoon. His lawyer Sandro Figueiredo is now trying to argue that her client’s firearm was discharged by accident.

The Fire Department has since suspended Albuquerque’s licence to carry and has launched an internal inquiry into his conduct.

The police have released him under investigation.

Mateus had moved to Rio de Janeiro from his home state of Minas Gerais five years earlier to find work.

He was saving up money to pay for his veterinary studies, according to his family.

His family said they had long feared for his safety due to the unsociable hours he worked.

McDonald’s said it was providing support to the family and was cooperating with the investigation.