I'm not sure I'd say it was justified even then. Warranted, perhaps but to say it is justified is to imply that it was, ethically, the right thing to do. Tactically and reasonably it might have been right to shoot the victim but, personally, I cannot even begin to consider it just to kill somebody in anything resembling those circumstances. Not that I wouldn't do it, if the alternative was the possibility of killing many people I had promised to protect and injuring many more. I wouldn't think it was right though, I'd think it was wrong but necessary.