Should capture him and demand that he be punished for attempted murder and hold the Duke accountable for remaining silent when his guest was threatened. And this time as well. It doesn't matter that he's the father of the MC's friend. That doesn't exonerate him nor put him above defending yourself. And if she has a problem with that, then she has no morals worth mentioning and is not worthy of being your friend. Any decent person, should their parent attempt to murder someone, should completely disown that parent and let them reap what they have sown. It doesn't matter how you feel about it, unless you're a pathetic slave to your feelings. If you are, then you're not a person. At all. Just a beast, like a dog or a cow.