The way this security device on this window operates, prevents the account given by Kate and Gerry McCann, that they gave to the police, about immediately discovering Maddie had been taken, and was missing (once everyone returned to apartment 5a from the tapas bar) Gerry rushing outside to open the steel shutter from the outside, and succeeding, being true - but rather that it was inaccurate and misleading, and helps to focus everyones attention on a made up account about what allegedly occurred back at 5a, once the disappearance of Maddie was discovered...