@WarmDreamer if this incident happened on Friday, it’s unlikely you will hear anything until tomorrow.
With my parent hat on, I would keep my child at home until a meeting between myself and the Headteacher and Designated Safeguarding Lead (DSL) had taken place. During that meeting I would be seeking reassurance over what steps have been put in place to ensure my child is safe in their care.
With my school hat on, please understand that schools are bound by GDPR and confidentiality rules, and quite rightly so. If your son wants to report to the Police, he doesn’t need the child’s details, just the name of the school. The Police will then issue a request for information form and the school is duty-bound to release the child’s personal information including address and parent/carer details. It’s unlikely the Police will do more than visit the child for an educational chat, unless there is a history or similar incidents or the child’s home life is cause for concern, for example. At the age of 10, the Police are unlikely to pursue a criminal charge, but it’s likely that the child will be referred to a programme to support them to make far better decisions going forward.
I would avoid discussing the incident with your DGS, but I would spend time looking at the school’s policies which they are obligated to share on their school website (at least those that are statutory policies). If your son is not happy with the school’s response, follow the school’s complaints policy.
There is no doubt that this is a serious incident, and had the teacher not intervened, it’s dreadful to think what could have happened. This is where the school’s policies will be tested, to make sure they are robust and protect all parties concerned.
Worryingly, primary aged pupils are increasingly found with knives, yet they don’t have the emotional intelligence to understand the dangerous consequences of carrying a knife. They see the headlines on the news, and across social media, and feel they need a knife for protection, without fully understanding how risky this is.
https://knifecrimematters.org/children-as-young-as-four-bringing-knives-to-school-sparks-call-for-urgent-action/
https://www.met.police.uk/foi-ai/metropolitan-police/disclosure-2023/october-2023/knife-crime-offences-schools-nurseries-january2018-september2023/
https://youthendowmentfund.org.uk/behind-the-knife-crime-statistics-understanding-children-who-carry-weapons/