I am going to reserve judgement until we know more. The immediate instinct is to show this as yet another example of someone with a gun defending his/her family.
But for all we know this was one gang member or dope dealer using a street gun against other gang members or dope dealers.
Gee.... Christmas Eve Socializing sure has changed since I was a kid.
Back then, we got a gun for Christmas.
Now, you need a gun to make it to Christmas.