Late Wednesday night, FBI and law enforcement officials released a photo of a person of interest who was spotted on mall security cameras.
The person of interest was described as a white male with gray hair with a silver mustache.
He was wearing a dark cap, stripped shirt, blue jeans and dark shoes. In the surveillance photos, the man is seen holding a white plastic shopping bag.
"Surveillance tape gave a shot of an individual walking in with a bag, coming in a corridor that the public would not normally use. And this individual possibly witnessed someone maybe coming in or out that area at the same time or he could possibly be involved," said Joly.
Jacki Kelley with the Jefferson County Sheriff's Office said the man "is nothing more than a person of interest."
"We don't know whether he's somebody we need to look at as a suspect," Kelley said.
ABC News' Pierre Thomas contributed to this report.