At least 68 schools that experienced a school shooting employed a police officer or security guard ; in all but a few , the shooting ended before any intercession . Security guards or resource officers were present during four of the five school shooting incidents with the highest number of dead or injured : the 1999 Columbine High School massacre in Colorado , the 2018 Stoneman Douglas High School shooting , the 2018 Marshall County High School shooting in Kentucky , and the 2001 Santana High School shooting in California
Stoneman Douglas High School shooting
Stoneman Douglas High School shooting
School shooting