As the school what their policy is for weapons in school. It's usually zero tolerance. Knifes/ blades are an automatic exclusion. It may be that because of the knife-owners age, they are reinstated. I can't think so though. They should have been immediately suspended while an investigation takes place. Your nephew has a right to be protected at school and I would raise very serious concerns with the school, the school governors, the PTA etc if they fail to act upon the report or the fact that a child at school had a knife. The things is, children will gossip and if word gets out that someone had a knife and got away with it, what type of behavior is that validating? Also - the child who brought the knife needs to be taught the dangers of knifes. It's more likely the knife owner gets stabbed than any other child. Please take this as seriously as it should be. No one is out to punish a child for making an error of judgement or a stupid decision, but the gap in awareness is very serious. It takes a second for this to have become a very different story. God forbid.