TULSA, Oklahoma - Police have released surveillance video from a Tulsa Dollar General store armed robbery back in December. 

Officers said in the video, a man is seen walking into store in the 1100 block of North Sheridan on December 21, 2015 just before closing at 9 p.m.

They said the man showed an employee a handgun and demanded money from the store's register. After getting the money, the man runs out of the store.

Police said the employee was not injured.

Detectives say if you know about the robbery call Tulsa Police's Crime Stoppers number at 918-596-COPS.