No, Joe, it's not considered a murder yet because there still might be the possibility that it would be considered self-defense officially (though I doubt it will be, in the end), and self-defense isn't murder. If the case ends up deciding that this is a murder, then we should in fact rename it that.

By the way, if those other articles are called "murder" this or that before the final outcome of the case, then they're wrongfully named too, and should be hunted down and corrected!