I'm reminded of the Moors murders. No-one has yet found the body of Keith Bennett, and Ian Brady declined to show Police where he had buried the boy. His parents have suffered for so long not having his remains to inter with dignity and find closure.
I agree that the correct verdict must be achieved by the abductor of Madeleine being properly investigated and tried.
I am full of compassion for any parents whose child has disappeared. One tragedy doesn't outdo another.
I have no children, but have worked with children (and their parents) for many years as a teacher/Guider. Every human being is precious. Evil must be hunted down and imprisoned for life.