Ah. So for the police officers in question there will have been a number of missing children cases in PdL, with all manner of parents behaving in different ways , which meant that they got a bit mixed up and forgetful, but all suddenly remembered in a blinding flash 5 months later. Thanks for the explanation CEdwards, it's all clear now. 
And you wonder why I question your intelligence?
The police have many cases. They don't have to be specifically the same in order to cause confusion in similarities in recall. Any emotional adult would cloud their recall I'd have thought.
Personally I doubt anyone's recall improving. Recalling additional facts, yes. Improving details of existing facts, no. Hence me not believing Gerry McCann for a minute changing his mind on which door he used.
That is why competent Police Officers write in their pocket books, make statements the same day, or do a hand over sheet, s they get all the information down as soon as possible.
Lazy, incompetent officers do not, and rely on what others tell them to write.
In fact the Officers statements were written after the McCanns were arquidos and had returned to the UK...Obviously important information was never passed onto anybody then...
As for the praying and banging on the floor... hmm let me think..your child has gone missing, useless incompetent Police are on the scene and nobody doing anything, yes I would bang my fists on the floor in frustration