@fortyacresandamule
Good question. From my perspective (and I Am Not A Lawyer), when I use the word ‘murder’ it is not in the legal sense. I state this in my post. Murder is a type of homicide as you appear to suggest(?) in your comment.
Furthermore, as you appear to suggest(?), murder, manslaughter, et cetera, are seperate and distinct terms, and terms of the legal persuasion and flavour.
And if this is so, then it suggests, perhaps, that some sort of legal activity (suspects held, investigations, et cetera) ocurred since the killing (homicide), in order for a classification of murder, manslaughter et cetera to be assigned.