I worked a case with the IP were the person wrongfully confessed and it was determined later that it was confabulation, which is usually something that is done by a person with Korsakoff Syndrome. We actually worked with Dr Sanjay Gupta and Richard Ofshe and Richard Leo. The only problem that I see with this scenario is that most of the time they are too forthcoming with information and usually feel remorse, from what I was told when working that case. It is why so many of the people that you hear about that have it (which isn't many, unless you are looking) have confessed to a crime they did not commit. Most often it is found in serious drug users and they often black out and when they can't remember or understand what has happened, they fill in the blanks with what they believe is the most likely scenario. They then, if they feel they were responsible, are overwhelmed with guilt and then confess. Who knows how the fake sexual abuse would play off of that tho.
Here was the study on the people who had wrongfully confessed, including the case I was working:
http://papers.ssrn.com/sol3/papers.cfm?abstract_id=1141365
ETA: I do NOT at ALL believe that she has Korsakoff Syndrome, or is a victim of her own confabulation. But he is grasping at everything else. Korsakoff is weird and technical enough that he might get someone to believe that more than the invisible nanny theory.
