I don't know - did the police ever ask him this vitally important question? If not, it makes you wonder why not, when it's such a pivotal point upon which the whole case undoubtedly rests.
Where would David's visit to the apartment fit into the statement by Mark Rowley: "However Madeleine left the apartment, she was abducted"
Did the visit contribute to the "however Madeleine left the apartment" part or the "she was abducted" part?
Certainly the confusion around the first part makes the second part more difficult to identify. E.g. in the unlikely event that Madeleine opened the window and the shutters herself, then Kate sees these open and thinks she was abducted by an intruder from within.
How could that relate to David's visit? There are some circumstantial evidences that I have noted so far:
1. Confusion as to the reason for the visit to Kate.
2. Confusion as to why DP went around to the patio door rather than the front door.
3. Confusion as to how long the visit took. 30 seconds , 5 minutes or 30 minutes.
4. Confusion as to whether Dianne and Fiona were aware of David's visit to Kate.
5. Confusion as to when the Paynes left to go to the Tapas (was it as early as 8:45, if so how did it take them so long to get to the Tapas Restaurant?).
6. Confusion as to where and when they passed Matt doing his first check.
7. Dianne's interference with the shutters after the alert.
8. David's immediate examination of the front door after the alert.
9. Dianne's expectation that Madeleine would be found after the alert.