Part 1:
I feel that the relationship between bullying and school violence is actually very large. You need to know that there's always a reason for violence, because there's a reason for everything, and a big reason why some people act out is because they think it's a way to get back at bullies. Bullying is horrible and can push someone so far down under in emotions that they feel like they can't make it. That's the reason why people lash out, it's a sign they need all the help they can get. Everywhere should be a bully-free zone but I know that can't always happen. Truthfully, I don't think that adults can do much at all to help students who are going through something very serious. Of course they should try and help as much as they can, such as asking how they're doing, offering up extra help, yelling at other students who the teachers see are tormenting the troubled child, and just offering themselves as a type of crutch, friend, or supporter to the student. School is where children spend the most of their time other than home, and it'd be nice to know there are grownups there as well that are supporting you. In a way the teachers are like the parents of school. If they notice a child is falling far down into a sort of depression they should try and help, and if that doesn't work, they should notify a family member or a guidance councilor. I got Adjustment Disorder when I had my knee surgery and it was a type of anxiety/depression, and I felt like I didn't want to get out of bed ever because there was nothing to look forward to even thought deep down I knew there was. Everyone was supporting me but it wasn't helping. If a kid goes through something they can't help, they should receive medical help right away. A way students can help other students from staying away from lashing out and even hurting others, is if they hear about it to tell an adult who they know will help, be there as a friend if you know them, and try to talk them out of it. Say that you've been there too, even if you haven't, just to give them the support they need so they can believe they will be able get out of the place they're in. Also if there are kids in your school who you notice that don't have many friends, and get picked on, but you don't want to be their friend, even a daily compliment could make someone's day 100% better because they don't receive them a lot.
Part 2:
I feel that this boy should be tried as an adult, because he is responsible for deaths of 3-5 people but it shouldn't be that he stays in jail for his whole life. Maybe being imprisoned for 25 years and then house arrest for another 20. He had a bad home life, so I do feel bad but he should never turn to murder as a way to express himself. His history was quiet but not perfect so it wasn't completely random and he posted something on facebook as a warning sign but still. He should be tried as an adult.