This article examines school shootings committed by men at least 25 years old: Marc Lépine, Kimveer Gill, Steven Kazmierczak, and Jiverly Wong.

This is not an autopsy report (though it does note that the autopsy found no trace of drugs or alcohol), but a comprehensive document including information regarding the perpetrator, his preliminary visits to the university, his actions during the attack, and the details of the emergency response.

I have not found any reproductions of Lépine's suicide note, but this document contains the text of the note in the original French and an English translation.