The US government has difficulty even preventing some channels of news media from publishing classified documents.

What would it mean for other areas of government-media relationship if the government could here, in the name of public safety, legislate a particular format for reporting on specific acts, and penalize deviation?

Could not this same pretext be used for every other category or aspect of reporting on crime, or reporting on anything at all? Would it not become obligatory? Shouldn't it, even?

It's perhaps an overly onerous burden to place on a Western state in its current manifestation.

You might refer to the successful promulgation of anti Holocaust-denial laws in parts of Europe, but these are aimed at preventing a very specific sort of expression entirely and not tightly regulating overall discourse. Further, all it requires from a government is to grant authority to law enforcement to target instances of the forbidden speech, not to design a specially conceived format prescribed to an institution. Of course, reporting on killings at all could always be forbidden wholesale. That would have interesting consequences...

But I'm afraid I'm not making myself clear. The one-liner is probably a better summary and guide for your imagination.