The man killed in Thursday’s shooting was identified by police as Kevin Michael Murray, 36, of Plano. Police said Murray and one of his coworkers, Alireza Nikmanesh of Dallas, began arguing outside the Subway restaurant on Custer Road about 6:20 p.m. During the argument, Nikmanesh took a handgun out of his car and shot Murray several times, police said. An off-duty fire captain saw Murray and began CPR until paramedics arrived and took him to a nearby hospital, where he died.