Since this case has been shared worldwide, why would the person posting it say nothing at all about the shooter being fired from the same news agency the two victims were employed by? The description is absolute, which leaves much of this terrible crime open to misinterpretation of fact.
It's really quite simple and any reasonable person would have no added burden of knowledge from hearing the whole statement.
Instead of making it into a short story about a gun killing two people, why not write a brief but articulate statement of known facts? This video isn't the kind of content needing a rating; it is a brief documentary of a violent crime.