Why aren't they saying who it is? Why is Caseys brother refusing to say who it is? After all this weird stuff going on, I am starting to wonder if her brother is the dad

Why is it such a contraversy who the dad is? I am just so confused by all of this. It seems she should be required to say who it is so that the father can be informed that he is was a father and his daughter died. Her brother is strangly defensive of her. I would not ever lie for my siblings if one of them did something like this. He just keeps saying he "HAS" to believe her. Makes you wonder if she has something on him?