How old is he ?
Was this in school?
The trouble with this is that at the very highest point it is a S5 public order.
I suppose one could argue it is a S4 although the threat was not immediate.
Either way, it is a low level public order I'm afraid.
You can complain to the police and they will investigate but it is not going to be given priority I'm afraid.
It is more of a complaint for the school than the police. This is to do with the conduct of one of their pupils and they do have anti bullying policies.
Can I clarify anything for you?
It is not very likely the police would pursue a S5 public order I'm afraid. There are not many prosecutions arising from S5 any more.
I'm not sure what you were hoping to do privately? This is an unpleasant comment but it doesn't give rise to a claim in law.
At the very highest point it is an issue for the school.
If the police do anything I would expect a youth reprimand or a fixed penalty fine.
it would be different if there had been an attack but this was just a threat.