Army Reserve soldier killed in Orlando attack Official DA Photo Army Reserve Capt. Antonio D. Brown, assigned to 3rd Battalion, 383rd Regiment, 4th Cavalry Brigade, 85th Support Command based in St. Louis, Missouri, was killed in the Pulse nightclub attack at 2:00 a.m. in Orlando, Florida, on June 12, 2016. (Note: Photo reflects Brown as a first lieutenant; his current rank is captain)