"This study, the 'Safe School Initiative', published in 2002, examined school-based attacks carried out by current students or those who had recently left school. The study created a foundation of knowledge and guidance related to threat assessment - that is identifying, assessing, and managing risks - in K-12 schools. Following the study, the Secret Service again partnered with the Department of Education on an effort that examined why students who had information about a planned attack either withheld or came forward with the information. This second study, published in 2008, identified aspects of a school's climate that either facilitated or hindered information sharing. These efforts spurred schools to develop innovative programs that foster safer school climates, enhance the trust students have in school staff and administrators, and effectively identify potential threats and handle them in a thorough and systematic way."
United States Secret Service: https://www.secretservice.gov/