Well, it was my dad...hehe. I was only in 3rd and 4th grade at the time. He was in the Coast Guard, stationed in Kodiak, so we lived in the compound, right in the shadow of Mount Barometer.
Well, my old conspiracy/alt news site cracked it (I think), the shooter's name is likely Gabe Parker. Bullied band geek, and apparently, his dad died the night before, and he was being bullied online, etc. (he posted a video where he was crying, so got teased). Apparently, there was a previous incident with a knife, etc.
If you ever saw X-Files, the folks on this site make the Lone Gunman look stupid....lol. (as long as you can separate the wheat from the chaff, that is)....
I'm with ya though, I'm betting some mental drugs are involved here. I'm thinking he got hold of dad's gun after the death.