[Josy]

Originally Posted by MTVN

Hmm according to this, which links to the Portuguese police files, the McCann's said from the start that the patio doors were closed but not locked, and somewhere else on the site it gives a pretty detailed abduction theory which gives a few reasons why the window might have been opened:

There was no fingerprints from anyone else on the window though apart from Kates.

(According to numerous websites online)