handgun. police do not contact him. reporter: photos from surveillance show al shirt and n vest pushing a shopping cart before pulling out a hled, a ste employee is treated at aniary hospital in critical condition. the suspect and the deceased male from inside had some sort of interaction inside the store. we don t know to what extent that was. reporter: the shooting happened this morning when the store was busy. one witness reported hearing mltiple shots fired. it is believed the suspect may have left in a vehicle. we re pursuing all investigative leads in order to find that individual and get him taken into custody. reporter: and the f.b.i. and a.t.f. are assisting with the investigation. police have identified a person of interest. his motive remains unknown. norah. o donnell: jonathan vigliotti, thank you. tonight the white house says