I don't necessarily think she's pig-headed or that she would rather blame MR than find Dylan, but I do think she's allowing her emotions to rule her rather than her head, and it doesn't appear to be doing much good at this time.
I don't expect everybody to be like me; in fact, I don't expect many people at all to be like me. If one of my sons had disappeared when he was young, and I was sure his father was responsible, I wouldn't be wasting my time trying to humiliate him publicly and turn everybody against him hoping to shame him into confessing. Instead of using precious media time arguing and making accusations, I'd like to think I'd handle it very differently. After asking the public in general to watch for him, my first task would be to sit down and think about any place that might be significant, and any person who might be helpful in hiding him. Once I came up with a list of places I thought he may be, or may have been temporarily, I'd use whatever media time I had to try to reach out to people in those areas to ask them to be extra diligent about searching for him.
If I thought there was any chance whatsoever that he could still be alive, the last thing I'd want to do is antagonize the person I thought had him to the point of changing that. Rather than telling him what a lousy person he was, I'd try to remind him of how much his son looked up to him (if that was at all believable.) I guess I just don't understand what any of the mudslinging is doing for anyone other than being a form of stress relief, but I can think of much healthier and more pleasant methods of doing that. If MR really is responsible, there will be plenty of time to bash him (with nobody complaining about it) AFTER Dylan is found. MOO