It was a mistake. A horrible, tragic mistake. Negligent homicide, but there was no premeditation, so a murder conviction is unwarranted.
The fact that she didn’t adminster aid after her tragic “mistake” underminds your argument. If she attempted to save his life I might agree with you. She did not.
It WAS a horrible mistake and none of us know how we’d react. Sure, she’d been trained to give aid, but she wasn’t working a case, she thought it was her own home. Murder requires premeditation, and there was no testimony of that. I stick by my original statement.