Replied in quote.Gunman 2 as in the person who fired back at the car?
Yes
That is an interesting scenario.
If person A was justifiably shot by person B, but person C did not witness/is otherwise unaware of that justification, is person C in the wrong (legally) for firing back at person B?
They have to explain why they fired, and who they were shooting at. I don't know where the last 3 shots went, that may play in too.