Video taken by @dallasnewsphoto appears to show the person of interest identified by Dallas police among bystanders at the time of the shooting. Police said the gunmen were shooting from an elevated position, and the person of interest appears to be standing next to officers with his gun pointed down. An organizer of the Black Lives Matter protest told CBS DFW that the person in the photo was his little brother and that he gave his gun to authorities after the shooting before going home. - Jillian