SUSSEX, Wis. (CBS 58) -- Crimestoppers in Waukesha County is offering a $1,000 reward for information leading to the arrest and conviction of the suspect in an armed robbery that happened in February in Sussex.

During the evening of February 13 around 7:30, a masked gunman entered the Clark gas station on Main Street. The suspect showed a silver revolver and demanded cash. The suspect was last seen running east through the parking lot towards Waukesha Avenue.

Officials believe the suspect is a white man about 5'9" to 5'10" tall with a medium build. At the time of the crime he was wearing dark clothing and a black ski mask with one dark colored winter glove on his right hand, and a blue latex glove on his left hand.

To report a confidential tip you can call 262-896-8047 or www.stopcrimewaukesha.com.