Authorities have not identified the shooter or the victim.
According to WSB-TV, witnesses said the shooter and the 49-year-old victim argued about a parking space before the gunfire erupted. A single shot was fired, police said.
The scene was so chaotic, shoppers told the news station families became separated.
“People were missing their family members,” witness Robin Reynolds said. “Some kids were crying 'cause they didn't know where their dad was at.”
The shooting is still under investigation.