Theories

1. Version 1: Accidental Kill by Parents - preferred by PJ Files
2. Version 2: Abduction Theory - preferred by Operation Grange

Wikipedia →Response to the disappearance of Madeleine McCann: “The disappearance provoked differing analyses by experts. Shortly after Madeleine went missing two former Scotland Yard commanders expressed the view that she had been abducted. Roy Ramm considered that it was a carefully planned kidnapping by someone who had been watching the child.[33] John O'Connor was of the view that Madeleine had wandered out of the apartment on her own and was subsequently abducted. O'Connor opined that she was likely to be nearby and recommended a thorough search of surrounding occupied premises.[34] This hypothesis was also supported by criminologist Mark Williams-Thomas who said, in May 2008, that he believed what happened was that Madeleine woke up, walked around the apartment, found the back patio door was insecure and wandered out. It was at this point that she was most likely abducted by an opportunistic predatory paedophile.[35] Paulo Sargento, a criminal psychologist at Lusófona University in Lisbon, however had produced in October 2007 a 3D reconstruction of events at the Ocean Club on the evening Madeleine disappeared. His view was that kidnapping would be inconsistent with the evidence.[36][37] The case was also reviewed by the notable forensic investigator Professor David Barclay of Robert Gordon University.[38] His opinion was that the police were right to consider the McCanns as suspects and that the child is probably dead.[39]”

Unusual strong Involvement of

1. Media
2. Politics
3. British Establishment - Money and social Influence
4. The Public and the Internet
5. The parents themselves - The Find-Madeleine-Campaign

see also at wikipedia →Response to the disappearance of Madeleine McCann

Thus arising many Questions besides the main question of “who killed or abducted Maddie?”:

1. Why wasn't brought Version 1 ever to court? The evidence is seemingly more than enough to bring it to court in any european country. Why didn't it ever happen? Especially if one mentions, that it would have been the best way also to unburden the McCann's and the Tapas 7 as well?
2. Why is the Version 2, which has until today not any clear evidence for it, the today (semi-)official version?
3. Why was there from the beginning the fact of the unusual high involvement of money and politics, besides the media, into this special case? Which must be considered in conjunction with the fact that there are other cases like the Maddie-case, some of them much more miracolous, which have not far the same attention nor by the media nor by involvement of very influential people in Britain?

A lot of still unexplained miracles lead to a lot of rumors and conspiracy-theories.

1. Rumors (type 1) and Conspiracy Theories to explain miracles of Version 1
2. Rumors (type 2) and Conspiracy Theories to explain miracles of Version 2

as well.

From this followed a lot of Libel-Cases against people and media involved. Thus there were:

1. Libel cases (type 1) regarding personnel damages against suspected people arising from Version 1
2. Libel cases (type 2) regarding personnel damages against suspected people arising from Version 2

as well.

Last but not least there were written some books regarding the Maddie-case since 2007:

1. Books close to Version 1
2. Books close to Version 2