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.
After the attack, Hainstock wrote letters from prison to a journalist in which he claimed he did not intend to kill John Klang, discussed his father, identified as gay, and provided other information.
On September 29, 2006, at Weston High School in Cazenovia, Wisconsin, Eric Hainstock shot and killed the principal, John Klang. This court case includes a review of evidence that Hainstock intended to murder Klang.