The fatal shooting in Denver of Lee Keltner, 49, during a clash between competing rallies over the weekend is just one of many in recent months amid Black Lives Matter protests since the death of George Floyd. But the shooting of Keltner may have a longer reach than others since he had been hired by a Denver television station, KUSA-TV, to act as a security guard for reporters at the events. The Denver City Attorney's office said that when the homicide investigation is concluded, the case might not be over. "Licensed security guard employers that hire unlicensed security guards could...