Averting Targeted School Violence: A U.S. Secret Service Analysis of Plots Against Schools [open pdf - 7MB]
From the Introduction: "As threat assessment programs have become more widely adopted by K-12 schools, NTAC [National Threat Assessment Center] set forth to examine those cases when a crisis at school was successfully thwarted. 'Averting Targeted School Violence: A U.S. Secret Service Analysis of Plots Against Schools' analyzes 67 instances when a current or former student advanced a plot to attack their school, but was halted before violence occurred. This study is NTAC's latest contribution to a body of research that demonstrates the path forward for school violence prevention. The findings presented herein should be utilized by schools and their surrounding communities to help intervene earlier and more effectively with students in distress."
U.S. Secret Service: https://www.secretservice.gov/