LITHIA SPRINGS, Ga. — Douglasville Police said a man was killed after a shooting in the parking lot of a Walmart store.

It happened at about 12:50 p.m. on Sunday afternoon at Thornton Road and Interstate 20, police said.

Investigators said they are working to determine the circumstances behind the shooting.

According to witnesses, the shooting appeared to happen after an argument between the victim and another man who claimed to be a police officer.

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Erick Wright was in his car and started recording on his phone after he heard what sounded like a gunshot ring out in the busy parking lot. 

"I just heard a shot fired," Wright said. "It sounded pretty loud. It almost could have been misconstrued with someone running over a bottle, like a bottle of water, you know."

Moments before, Wright said it sounded like the two men had been arguing. He looked over to see the supposed police officer with his gun drawn, yelling for the man inside a car to put his hands up. When the victim was actually shot is unclear, but Wright said seconds later, he heard the officer call for his wife to get his badge. 

"So, I went ahead and started filming him," Wright said.

READ | Witness describes tense moments of Walmart shooting near Litha Springs

He said the officer asked for him to call for help. Wright said once he realized the shooting was over, he walked to where the police officer was near the victim's car.

Wright said when he got there, it appeared that it was a single shot had been fired through the back window of the victim's car. As for why the officer fired the gun, Wright said the officer reported seeing the victim reach for something, and that's why he shot.

11Alive reached out to Douglasville Police Department to verify any parts of this story, but they have refused to comment, so far. 

11Alive also asked the Georgia Bureau of Investigation for more details, but they said they were not involved in the investigation. 

This is a developing story. Please check back for additional information as it becomes available.