A student with a blacklist

The 20th of April a thirteen year-old student of the high school Joan Fuster killed a teacher with a crossbow, the murderer was equipped with multiple weapons. He broke the law in many ways but he can't be judged because of his age. Due to this incident is something wrong with our security? Are we able to improve it?

Obviously there's a problem with the high school's security and there are many options. I think metal detectors could be the solution but it has some weak points because there are some weapons that are made of wood or other materials that cannot be detected.

We can also improve our security by teaching morality values to the students or applying a measures to know how they are mentally.

Changing the law due to this incident could be a good idea, probably the teenage knew beforehand that he wouldn't be punished.

In conclusion there isn't only one way to solve this delicate issue but we must do something to know how to avoid or at least handle this kind of situation in the future.