What does force me in the color of law?
You can't use a deadly force unless it was being used or intended to be used against you.
Because someone punched you in the face, this isn't the movies, you can't pull out a gun and shoot them.
Force must be met with equal force.
There is no what you think is right when you get to a court room and in front your 12 peers and they hear the sob story about how the guy you shot or stabbed never had a weapon and he was a model citizen going to finish his degree next year and worked 80 hours a week to feed his family and newborn.
They will paint a picture, and all the jury will see is you used deadly force and this person had no weapon. And don't say they used their fists. Then you could of equally done the same.
The person would of had to been beating you to your last breath and then you, saving your life, took a last step measure, and "sadly didn't want to take the life of another individual", you then used deadly force.
That chick being beaten, went behind a counter and pulled out a gun, a jury seeing that vid, she's done.