Break Laws?

Breaking laws is actually not okay at all, obviously, but is there any reason for it to be okay to break the law? Is there any reason that completely breaking a law would be acceptable? This is something that had been debated for years because of circumstances. When the circumstances are different, should the laws be different? Obviously when a person goes into a store and takes something it is against the law. But think about this, what if it is poor homeless women with a new born getting food to feed her and her child. Does that make it okay to break the law? That circumstance is not as common as a regular old shop lifting story. How about this idea, what if there is an awful man who has been doing bad things. This man rapes a father’s daughter and she tells her father. She showered after so any evidence was gone. The father and daughter knew who it was and took him to court but the guy was let go because of not enough evidence. The little girl finds out the man has raped another friend of her after her, the father knows that this man will not stop. He finally goes to the man’s house and kills him. That is murder, which is a felony. Yet, the man was a rapist of little girls and wasn't getting caught. The man himself was a sick human being. This man ruined lives and made little innocent girls suffer. So technically this man deserved to be punished, and be punished by death so is it okay for the father to have killed him. The man did deserve what he got but is it okay for someone to do that. It is no one’s job to kill someone who was not convicted of their supposed crime/crimes. This to me is such a wishy washy way of life and law because there is so many cracks. There is no way that this can be fixed though because the law cannot say it is okay to kill someone because they “deserved it”, because that would cause even more grey areas.