Very sad. Seems like a lot of kids falling through the cracks in public high schools. My son went to a funeral a few months ago for a classmate who committed suicide. He was 16. In the last three years at his high school there have been 4 other known suicides. No easy answers.
One thing that isn't helping is sending the message to kids that "adults don't really care about you" and they (teens) have to take care of themselves. The fact that adults disagree on exactly how to solve the current situation doesn't mean that they don't care and are not to be trusted. We need more kids reaching out for help to adults (and not just their peers) not more alienation from adults in family/community.
Bullying should never be used as a viable excuse or justification for shootings or suicides for that matter. This is also part of the problem imho. How many of us were ostracized because we were different in school, yet we didn't shoot people and I don't believe there was anything particularly "special" about us. I just think it wasn't an option and we didn't grow up in an era where being a victim made us less accountable for our choices and actions.