It is still Murder no matter how you look at it, I don’t care if she made a mistake. She went in to another persons apartment and Killed Him
Murder implies intent. Ii might turn out to be manslaughter.
If drive out to the bars armed, drink until you are shitfaced, and get back in your car drunk you are not going to make any mistakes.
You fully intended to do whatever happens.
She never should have been a cop.