She armed herself, she confronted the guy, and he still tried to break in. More proof that criminals don't fear guns, only a determined person standing behind the gun. Sometimes, as in this case, they don't even fear the determined person behind the gun.
From Link Removed, sounds like she was on the phone for 10 minutes with 9-1-1 before she shot the guy. Yet again we see evidence human beings really are averse to the idea of killing another person. We do it if needed to stay alive, but there's no blood lust.
"I shot. I shot,” Jackson tells the dispatcher frantically. "I’m going out front. I hit him. Oh God, help me! I dropped the phone. ... Oh please, dear God, I think I’ve killed him.”
As the reality sinks in, her voice fades to a whisper, "Please, Father in Heaven. Please, Father in Heaven. Oh my God, ma’am. Please.”
And she begins to sob, "I’m sorry. I’m so sorry.”
Kudos to the dispatcher.
The dispatcher on the other end of the line tries to comfort her, telling her there was nothing she could have done — she had to protect herself.