Given the fact Arbery initiated the fight, at the point Arbery grabbed the shotgun, under Georgia Law , McMichael was allowed to use deadly force to protect himself.
"Those that think they know everything are annoying those of us that have Google." - Dr. D. Edward Wilkinson
Note to self: Never ask an old Fogey how he is doing today. Revised note to self: Keep it short when someone asks how I am doing.