Man, what a horribly tragic event. I feel for the family of the man who was shot and for the former LEO.
Let's take a look at MN law. She is charged with first and second degree manslaughter, not murder. First degree manslaughter is a bit of a stretch. I don't see how the facts of this case qualify as first degree manslaughter under MN law. Second degree? Maybe. Here's the statute:
609.205 MANSLAUGHTER IN THE SECOND DEGREE.
A person who causes the death of another by any of the following means is guilty of manslaughter in the second degree and may be sentenced to imprisonment for not more than ten years or to payment of a fine of not more than $20,000, or both:
(1) by the person's culpable negligence whereby the person creates an unreasonable risk, and consciously takes chances of causing death or great bodily harm to another; or
(2) by shooting another with a firearm or other dangerous weapon as a result of negligently believing the other to be a deer or other animal; or
(3) by setting a spring gun, pit fall, deadfall, snare, or other like dangerous weapon or device; or
(4) by negligently or intentionally permitting any animal, known by the person to have vicious propensities or to have caused great or substantial bodily harm in the past, to run uncontrolled off the owner's premises, or negligently failing to keep it properly confined; or
(5) by committing or attempting to commit a violation of section
609.378 (neglect or endangerment of a child), and murder in the first, second, or third degree is not committed thereby.
If proven by a preponderance of the evidence, it shall be an affirmative defense to criminal liability under clause (4) that the victim provoked the animal to cause the victim's death.
The only subsection of the rule that makes any sense here is (1). And that's tough sledding for the prosecution. It will have to lean on the argument that she created an unreasonable risk by having both her gun and her taser on the same side. Also, it's tough to say she consciously took the chance of causing "death or great bodily harm" by intending to use her taser.
Ultimately, here, the facts may not matter. I think most potential jurors will feel like a LEO is an expert in guns and gun safety. Confusing your taser for a gun is a huge mistake. A man died, whether she intended it or not. It would not surprise me if she is convicted of second degree manslaughter. It would also not surprise me if she walked. The statute is not a good fit with these facts.