[jcabin]

I had a conversation with a retired army ranger/state trooper just after I received my LTCF on the topic of wounding shots etc. He said something along the lines of "if you draw your weapon you better make sure there was no other way of getting out of the situation, and if not you better kill him because if you dont he's going to argue in court that you didn't have to and then you're fucked". Then he said in almost every self defense shooting the victim was brought to civil court by the assailant(dead bad guy)'s family.

I think my immediate reaction if someone was attacking me directly would be to aim for center mass and stop the threat against my life.
I would not bother sighting up for a leg shot because nomatter where you shoot, you're using lethal force.

That being said, if you used lethal force and crippled the assailant he can now take you to civil court and sue you for his medical bills, having a shitty life, etc.

It seems you would be better off just shooting center mass.