If her story is true, she could have made a case that she feared for her life from "Kut Throat". But not the trick she robbed and murdered.
I think the prosecution case makes far more sense. Note also that her victim is not alive to defend himself. She can spin whatever yarn she chooses, but that does not make it truthful or even credible.
If it was really self-defense, why also rob him?
Guns were involved. He "showed his guns to her". She also had her own gun. He shows his gun collection to a hooker he picked up off the street? She goes with a john and brings a gun? Whaaat? That's life in Tennessee I guess.
She probably had the gun because she planned on robbing him from the beginning.
This is also weird. Why should her case determine that other minors can't get life in prison? Either that should be a thing or it shouldn't. I don't see why her particular case should decide that in principle, nor why it should decide any particular case that isn't hers. There could be a cold blooded killer kid who unlike her clearly intends to kill again.
I think she
is a cold-blooded killer. Don't let her gender mislead you.