The robber was last seen running west from the scene. The robber is described as a white man in his late teens or early 20s, about 6'2" - 6'3". They said he was wearing a dark grey ski mask, a plain blue hooded sweatshirt and light khaki pants.
If you have any information, contact Crystal Lake police at (815) 356-3620 or Crime Stoppers at (800) 762-STOP (7867) for those who wish to remain anonymous. Crime Stoppers pays cash rewards for information leading to the arrest of any individual.