This is one of those hard cases that make for bad law.
Prosecutors really hate self-defense cases.
Because it takes what is a slam dunk homicide conviction and punches holes in it.
In order to claim self-defense, you first have to admit that you killed someone.
"Yes, I killed him, but the law says that is ok under very specific circumstances."
And they really don't like that.
This will get pled out to manslaughter with little jail time.
Nobody wants this to go to court.