A former student armed with an AR-15 rifle opened fire at Marjory Stoneman Douglas high school in Florida, killing at least 17 people on Feb. 14, 2018 in Parkland, Florida in a harrowing shooting spree that saw terrified students hiding in closets and under desks as they texted for help. Broward County Sheriff Scott Israel identified the gunman as Nikolas Cruz, 19, a former student at High School in Parkland, Florida.