A college student whose body was found at a Georgia mall had been dead for about two weeks, according to officials.

Silling A. Man, a Georgia State University sophomore, was discovered Dec. 21 in a vacant Subway restaurant at Gwinnett Place Mall in Duluth, the Atlanta Journal-Constitution reported.

The cause of her death was not released, but officials noted that her body was in an “advance state of decomposition,” according to the Gwinnett Daily Post.

The 19-year-old initially disappeared Oct. 8, but returned home shortly after a relative contacted police. Two days later, Man went missing again, according to authorities.

No missing persons report was filed over her second disappearance.

Police said Man was last seen Nov. 20 when she picked up a paycheck at a store in a different mall from the one where she was found dead.