You only are required to escape if your state law demands that. Here in Indiana you can now stand your ground and are not required to "escape".
Missouri is in process of passing the same law. I am not convinced that will satisfy a DA looking to be a pain. St. Louis County would not issue CCW permits for almost 2 years after the law passed. They claimed a "funding issue", but in truth the Cheif and a bunch of pliticians were against it. Safest bet is to make an incident your absolute last resort.
