So, who entered apartment 5A (the McCann apartment) at around 10.30pm on the evening Tuesday 1st May 2007, remaining there until about 11.45pm?
It wasn't the McCann parents, that's for sure...
Let's assume that the McCann entourage were creatures of habit, insofar as the evening meal at the tapas bar was concerned - meal served at say 9pm, drinking at tapas bar, etc, etc, etc, takes the time to around 10pm..
Seems to me that by and large the lot of 'em were on their way back to their respective apartments somewhere between 10 - 10.30pm each evening. Except for the evenings Tuesday 1st May 2007, because on this particular evening they went from the Ocean Club down the road in the direction of the beach and entered Chaplin's bar near to the local church and the all important derelict building (No. 5 Ave Dos Pescadores), they were drinking in Chaplin's bar until gone midnight. There was no way they could claim to be within a stones throw of their apartment, they were 10 - 15 minutes away and could not even see any of the Ocean club apartment blocks on the skyline from where they were...
It seems to me, that somebody or other, either a member or members of their group, or members of Mark Warner staff, or a local sex offender or two, realised the significance of the distance between Chaplin's bar and apartment 5A, someone who knew that the McCann parents always left unlocked the poolside patio door of apartment 5A. I am convinced that by the time the McCann party arrived at Chaplin's bar, that the suspect or suspects were entering apartment 5A with Madeleine and her brother and sister at their mercy. It might have involved a lookout being inside Chaplin's bar keeping close tabs on the McCann couple and their companions. Maybe the lookout would ring his / her accomplice(s) on a mobile phone, or from a nearby public telephone box had the McCann parents left Chaplin's bar early...
Well, according to Mrs Fenn, nobody checked on the McCann children inside apartment 5A for the whole of the period 10.30 - 11.45pm, on that particular evening (so much for the McCanns claiming they did 15 minute to half hourly checks on their own apartment). - it may be worthwhile the police checking phone records for this period..