An extraordinary case.
I spent hundreds of hours tracking this with the help of some guys in Portugal.
I always work in to out on my assumptions, that is to say the closest route, insider knowledge and location to the crime. At one stage I came across some info that pointed towards the involvement of the parents. I emailed the relevant documentation to Leicestershire Constabulary.
The parents were totally to blame anyway, in as much that they left the children alone night after night - not to mention dropping them off at every available opportunity in the daytime, and perhaps, in doing so, created an opportunity for someone with knowledge of this.
I do not believe international gangs were involved in any way.
The police in Portugal believed, and still do believe, that the break-in to the apartment was fabricated by the McCanns.
I would be very interested to hear anyone's views on this - especially those of Mike Tesko who has taken some very good shots of the area.