Checklist of Characteristics of Youth Who Have Caused School-Associated Violent Deaths
none
http://www.schoolsafety.us/Checklist-of-Characteristics-of-Youth-Who-Have-Caused-School-Associated-Violent-Deaths-p-7.html

Early Warning, Timely Response-A Guide to Safe Schools
A Guide to Safe Schools Identifies both anger and aggression as two of the many warning signs.
http://cecp.air.org/guide/guide.pdf

Peaceful Schools - Warning Signs
List of warning signs that merit attention by educators and mental health experts. Signs are identified by age groups.
http://www.nwrel.org/request/oct98/article6.html