Yet another police shooting of a black man in St. Louis area

[MSG]

So I have thinking about this all day. From my understanding (which could be completely wrong) the burden of proof for stand your ground is merely ones belief that their life is being threatened. What would happen if a young black man killed a cop approaching him and claimed self-defense under stand ground laws citing these recent shootings as proof that he had a justifiable reason to fear he life was endanger. It could be that this is too cute by half, but it seems like it could work as an argument (for a Cochranesque Chewbacca defense) if the burden of proof is merely the perception that ones life is under threat to kill under stand your ground. Or this could be completely stupid dunno.