He was wrong for murdering the woman when it wasn't necessary.
It was her own fault she got murdered.
Where's the confusion?
I think some of you are focusing too much on the "law" and not enough on morality as it pertains to what's right and wrong.
I dunno about the law but ethically speaking what the old man did was wrong. It would be one thing if he happened to come upon them in his home and he shot them cause he doesn't know what going to happen. However, the robbers were retreating and the old man's life was no longer in danger. So that means he killed them because they robbed his house. I don't think a person deserves to die for that. Killing someone is only justifiable if your life is in danger. The standard for taking a life seems to be getting lower and lower.
But who's to be sure that they were fleeing the premises or simply running to the car to get a gun of their own? Who's to say that the pregnant woman couldn't have had a weapon concealed herself and used it after she told him to stop shooting? These are all split second decisions, and could have definitely happened, therefore I think the man was justified in shooting the lady mortally...you just never know what could've happened in such a situation
In case people missed it the first time