This is obviously going to be controversial. The circumstances are - odd to say the least. I wouldn't want responsibility for sorting this one out.
Apparently firearms training isn't the Louisville Police Department's strong suit. But then we could say that about the vast majority of police training programs nationwide.
SLB, if you face an intruder in your home he's yours. Doesn't matter how many times you shoot him. However, panic would be the only thing causing twelve rounds to be used IMO.