If she had seriously injured or killed a burglar who was still in her house, she probably would not have been charged as generally, if your house is broken into and you reasonably feel threatened, you may attack with a deadly weapon.
Generally you have to be in reasonable fear for your life to be able to legally use deadly force.
That may be met in your house, but also may not (consider a daytime break in burgular is a female, child, physically small, impaired, handicapped).
Talmud suggests that you can use deadly force at night based on the breakin alone (as you can’t see to know what the person is doing) but can’t during the day (absent further provocation).
But then some prosecutors frown upon injuring a fleeing perp.