Is it negligent if she was justified in using lethal force to begin with?I agree. I don't know what the jury will do (they are deliberating), but I don't see that charge.
I agree that in a civil case, negligence seems crystal clear. If Minnesota had a straight negligent homicide statute, liability as well, but straight negligence as a crime is VERY rare. Generally speaking, the law is fine with people paying damages caused by negligence- a mistake- but there are very few places where mere negligence can result in a deprivation of liberty. Even where "criminal negligence" is on the books, it usually looks more like recklessness, as in this case or at least "gross" negligence.