It can't be a legal standard, because if someone starts a fight, that certainly does not give you the right to do whatever you want in retaliation. Or do you think that if I gave you a slap, you slapped me back, you could then also pull out a gun and shoot me?
No attacking someone is not the same thing as putting your weapon down.
I am aware. But if the standard is imminent threat of serious injury, or whatever it is, then the result is that he no longer carries a weapon.
There is another standard that if you start a fight the other guy gets to finish it.
It can't be a legal standard, because if someone starts a fight, that certainly does not give you the right to do whatever you want in retaliation. Or do you think that if I gave you a slap, you slapped me back, you could then also pull out a gun and shoot me?