This article categorizes nine perpetrators of rampage attacks as psychopathic, psychotic, or traumatized school shooters. The shooters are Eric Houston, Gary Scott Pennington, Jamie Rouse, Jason Hoffman, Robert Steinhäuser, Alvaro Castillo, Eric Hainstock, Tim Kretschmer, and Wellington de Oliveira.

This document contains excerpts of Castillo’s journal, in facsimile.

 This court case provides a detailed history of Castillo's life and psychological problems.

Castillo argued in this case that the court erred regarding how to instruct the jury about an insanity defense.