Gwinnett County Citgo Armed Robbery

Gwinnett County authorities are asking for the public's help identifying a man who robbed a convenience store.

It happened Thursday at the Citgo on Hamilton Mill Road in Buford.

Store owner Song Chen said the robber was a former customer. He said the man walked in and asked to use the restroom. A minute later, the man was out of the restroom, dressed in all black and wearing a mask. Store surveillance video shows him forcing Chen to the ground.

Police said the gunman grabbed cash from the drawer and snatched a handful of cigarette packs before exiting the store. Video shows the man did a good job of hiding his face when he first walked in.

Chen said he was very traumatized by the incident.

Anyone with information should call Gwinnett Police or Crime Stoppers.