Law enforcement officers block off the entrance to Marjory Stoneman Douglas High School in Parkland, Fla., on Thursday. Nikolas Cruz has been charged with 17 counts of premeditated murder after Wednesday’s attack on the school.

Law enforcement officers block off the entrance to Marjory Stoneman Douglas High School in Parkland, Fla., on Thursday. Nikolas Cruz has been charged with 17 counts of premeditated murder after Wednesday’s attack on the schoo