Speaking honestly here, if LEO busted into my house with a typical ram my pants would be down even if I thought it was a dozen homeboys rolling in. I'm not ordinarily ready to kill someone within 0.5 seconds when I'm in my home.

Now, ymmv, I'm not speaking ill of anyone who carries in their home. I don't think her boyfriend fits the bill of upstanding citizen, in-home ccw. I'm pretty sure he was paranoid and ready for the wrong reasons.

Nothing that either of them deserved to die over, not justifying the no knock here, that's been discussed to death several times.