The fact we all know is that the ME called it a homicide. Since you disagree, it would be interesting know when you examined the body.
Definition of “homicide” as per the website Findlaw.com;
The very first sentence reads;
“To begin with, not all homicides are crimes.”
Accident is what this is. Your repeating of the word “homicide” is not the end all be all in deciding wrongdoing.