No charges will be filed against a 7-Eleven security guard who shot and killed a man in August after the two fought over a gun outside an Aurora convenience store, prosecutors announced Monday. A video released by the 17th Judicial District Attorney’s Office shows 36-year-old Vernon Dorsey rushing up behind the unidentified security guard outside the Aurora 7-Eleven, holding a gun to his head and pushing him up against the wall. The security footage has no sound, but Dorsey demanded the security guard’s gun and threatened to kill him, according to a news release from the district attorney’s office. In a fight that lasted just over 30 seconds, the two grappled over the gun until the security guard shot Dorsey once in the chest, the video shows. Aurora police officers responded to the convenience store shooting in the 12000 block of East Colfax Avenue just after 9 p.m.