If I was in that situation, it would be a judgement call. But, heres my .02. This is my law enforcement training coming out, please don't mind me .
Reasons for deadly force
1. Self defense and the defense of others
2. Assets involving national security
3. Assets not involving national security, but inherently dangerous to others
4. Serious offenses against persons
5. Arrest or apprehension
6. Protect public health and safety
7. Escape
In this scenario, number 1 would apply. So yes I would use deadly force if my approach did not remove the "assaulter" from the "victim".
The Tourist
Whether the person on top is the one defending himself, defense should stop when the threat is removed. If the person who assaulted you is on the ground knocked out, this is not "defense" if you keep pummeling him.
Sorry for the rant.
Reasons for deadly force
1. Self defense and the defense of others
2. Assets involving national security
3. Assets not involving national security, but inherently dangerous to others
4. Serious offenses against persons
5. Arrest or apprehension
6. Protect public health and safety
7. Escape
In this scenario, number 1 would apply. So yes I would use deadly force if my approach did not remove the "assaulter" from the "victim".
From that standpoint, stopping the fight in any way means the felon might successfully attempt a counter-attack. Meaning it may have been better to let the winner finish him off.
The Tourist
Whether the person on top is the one defending himself, defense should stop when the threat is removed. If the person who assaulted you is on the ground knocked out, this is not "defense" if you keep pummeling him.
Sorry for the rant.