Gunman wrote note to his mother, sister and father in the notebook.
Notebook contains sketches of stick figures with notes "Equal to ? Infinity or zero or negative infinity?"
Gunman wrote in notebook: "If life has no value, all is just."
@FMM: I can handle that for you!
Gunman wrote about seeing quick fleeting movement in his peripheral vision, several times a day for at least a year. Thought maybe it was a crow or a beetle. When he turned his head, there was nothing there.
Gunman wrote he had trouble concentrating for more than 15 minutes and had to break up study periods with watching TV.
Gunman wrote in notebook: "The real me is fighting the biological me."
Gunman writes about pulling out his hair from different places on his head and face over the years, causing bald spots.