At least 17 people were dead after a 19-year-old former student opened fire at a South Florida high school on Wednesday afternoon, officials said. The suspect was identified as Nikolaus Cruz, a former student who had been expelled from Marjory Stoneman Douglas High School in Parkland, Broward County Sheriff Scott Israel said. He said at least 14 other people were injured in addition to the 17 people killed. The first sign that something awful was happening came around 2:30 p.m., not long before classes were supposed to have been dismissed, when authorities were called to respond to an active shooter. For more than an hour, the school was at the mercy of a gunman on the loose.