In my opinion the night of 1st May is crucial to this enquiry. Quite a lot was going on that night. Escalating crying came from the apartment. Was Kate in the apartment for some of this time?
What was going on in the apartment that night? Were there any accurate reports of Madeleine having been seen after that evening? This should be reasonably easy to verify from staff at the club or other witnesses.
A child, thought to be in the McCann'a apartment, was crying out in distress for over an hour that evening. This has not been adequately accounted for.
In her book, Kate downplays the events of that evening, saying only two minor aspects stand out as differing from the norm. One was that Russell wasn't there. The other was that Madeleine came into their room complaining that Amelie was crying and and had woken her up. 'Gerry checked on Amelie, who settled quickly, and we let Madeleine jump into bed with us'.
We are then told that Wednesday 2 May was 'our last completely happy day. Our last, to date, as a family of five.'