hen gunman Nikolas Cruz showed up ready to kill, the lone school resource officer at Marjory Stoneman Douglas High was not in the building that housed freshman. Instead, School Resource Officer Scott Peterson was elsewhere on the 45-acre campus during the attack that left 17 dead and 16 wounded, Schools Superintendent Robert Runcie said Friday. “Staff and everyone responded quickly,” Runcie said, based on a briefing by the Broward Sheriff’s Office. “The SRO was communicated with but was on another part of campus.” Peterson, a deputy with the Broward Sheriff’s Office Parkland district, has been the SRO at Stoneman Douglas...