Metro police released surveillance video early Tuesday morning of a robbery at the Dollar General in Old Hickory.
Authorities said a man dressed in all black entered the store at 311 Martingale Drive around 9 p.m. Monday.
The video shows the man enter the store, point a gun at the employee and demand money.
The suspect got away with $500.
He is described as a black man in his early 20s, about five feet, ten or eleven inches tall, with a thin build, and was wearing a black hoodie with a white football helmet emblem on the front.
Anyone with information is urged to call Crimestoppers at 74-CRIME.