Reading posts like this makes me hope I never have to face a jury in a situation like this. I have four guns within reach of my bed; I have no clue where my phone is typically, and when I get woken up in the middle of the night by my dog going crazy, I am downstairs in full tactical mode before I am even conciously aware of being awake. If someone was breaking into my house it would be pure adrenaline and musclue memory... I would never even consider looking for my phone in any situation like this, it just wouldn't occur to me. I'd grab a gun, and take down the threat. From a reasoned perspective, it still doesn't make sense to find a phone. I grew up in a very rural area, and did my time in the Army, and learned early to take care of myself with no reason for the government; if I call the cops it just creates greater risk for everyone involved.
People keep saying: breaking in. But there is no indication this woman was breaking in, it’s only been said that she was banging on the door. That might have scared this guy or annoyed him but in and of itself it is not a threat to him.
And it does not seem that anyone has established that she was a threat to him.