Playing devil's/CX1's advocate, I don't think there can be any (sane) argument that at the moment the decedent was shot multiple times, there were firearms pointed in his general vicinity. The question I would have was whether they were pointed thusly immediately prior to his opening of his front door.
That was kind of our main discussion as well before all of the incompetent things were said. And that's what I would like to know. I can only assume they were since the police got the first shot off and they claimed the victim already had his gun pointed at them. Then again, you know what happens when you assume... but it only makes sense that they had them drawn beforehand.