The topic of murder justification is an interesting one.
One case that comes to mind was Gary Plauche. Plauche murdered Jeffrey Doucet for the molestation of his child.
Graphic warning: NSFW
Gary didn't receive any prison time for this. 5 years probation and 300 hours of community service was about the extent of it.
However, when it comes to the case of justifying murder of a CEO. I just can't get there from here.
Gary Plauche's case I struggle with as a father. In some ways I think it was absolutely justified. Others, I still struggle. Put in that position, would I do the same? I can't say.