Are you asking if you can force him?
No, in short.
The fact that your son is 13 makes no difference. The law of photography applies to minors and adults alike.
A photograph or footage belongs to the person who takes it unless there is a contract for the negatives.
You don't need consent to film a person. If you did the activities of the press would almost always be unlawful.
If this footage does exist then he is perfectly free to use it accurately to name and shame I'm afraid.
The reason that you often see images of children blanked out is that it was one of the undertakings in the Levenson enquiry that the press would do that. It only applies to the organised press and, in truth, is not law anyway.
A random members of the public is not bound by it.
Sorry if that is bad news.
Can I clarify anything for you?
Well, if it is only of him dropping litter then that is an offence but it is not the worst crime.
The police obviously aren't interested so I would just ignore it.
All the best.