The perp's were also in the act of committing a forcible felony which is the third justification for use of deadly force in Ga.
Thanks for adding that. I skipped it based on the obviousness of it but that is certainly another valid legal justification for the use of deadly force.
You are always evaluating and staying 1 step ahead. The use of force scale is a sliding continuum and constantly changing based on the situation. Sounds like you already know this so I'm just writing it for the readers that don't. I think the bottom line is that jeopardy is simply perception and so many factors feed into that perception that it's simply a judgement call. Some will act sooner than others. 
