If someone broke into my house and I shot them, I better be clear who I am shooting and that there was an imminent threat requiring that I shoot them. While accidents happen, there is no room for them when the results involve someone dying. Shooting someone without clarity about your target and appropriate threat making this necessary is wrong. She should be charged with murder.
There could be extenuating circumstances - maybe the daughter did not live in the area and her arrival was an unexpected surprise, maybe the woman was being stalked, maybe there had been recent break ins, etc.
But "shoot first, ask questions later" and "shoot, shovel and shut up" are bad pieces of advice from idiots and have clearly both backfired this week.
The very fact that someone broke into your home is by definition of the castle doctrine an imminent threat.
Agreed.