Armed assailant robs armed car employee. Gets nothing

An armed car employee was robbed by a suspect identified by police as an African American 5-9 brandishing a semi automatic weapon at the frys super market located at 67th ave. an Indianschool Road. According to police the suspect waited till the armored car employee entered the store, however he didn't have any success as the bag he took was empty. Police are now looking for the suspect and are asking the community for leads in helping apprehend this idiot.