JustAFan
The Adebayo Akinfenwa of football photoshoppers
Wouldn't exactly this kind of behaviour serve to explain the McCanns continued endeavours to find the 'abductor' of their child even though really they know that they disposed of the body themselves after she suffered a fatal accident in their absence that night?
It could be one possibility, when you consider the entire realm of possibilities, though the simplest answer is that they continue their endeavors because they want to find out what happened to their child and deep down may still have hope of seeing her returned.