Safe School Initiative: An Interim Report on the Prevention of Targeted Violence in Schools [open pdf - 397KB]
"As reports from the U.S. Department of Education and others have shown, school id one of the safest places for our nation's children. However, several high-profile shootings in schools over the past decade have resulted in increased fear among students, parents, and educators. The Secret Service Safe Schools Initiative focuses on a rare but significant component of the problem of school violence- incidents of targeted violence in school. 'Targeted violence' is a term developed by the Secret Service to refer to any incident of violence where a known (or knowable) attacker selects a particular target prior to violent attack. This paper looks at how certain individuals might be at particular risk."
National Threat Assessment Center: http://www.treas.gov/