Why does this even require "stand your ground" as a defense? Who is possibly trying to press charges against the victim?
Liberals, mostly. The UK and some other countries have gone so far to suggest a "Duty to Retreat" where, if you're being attacked by somebody intent on killing you, you have to demonstrate that you took every available effort to escape the encounter before killing them in self-defense.
Bearing in mind that even in the US, most times if you execute an already-incapacitated attacker you'll likely get in trouble over it with the possible exception of either the Castle Doctrine or Stand Your Ground. In general, though, when you're attacked within your home and retaliate that generally is seen to fall more under the Castle Doctrine whereas SYG is really intended to extend the right of the Castle Doctrine to broader self-defense outside of a property you own.
sadly in california it doesn't matter if someone breaks in and is stealing something. unless they try to attack you/someone you can get in trouble for shooting them ---