Only Matt and Russell would be aware of that according to the statements.
Well that shows a couple of glaring differences from the second timeline to Matthew Oldfield's statement.
Timeline 2 has
Matt Oldfield listens at all 3 windows 5A B D ALL shutters down yet in his statement he claims to have entered 5A and no mention that all shutters were down, in fact he appears to me to imply that one was at least slightly open
His statement 4th of May has
At around 9.25pm, the interviewee went into his apartment and Madeleine's apartment to check on the children. He states that the door of the bedroom that was occupied by Madeleine and the twins, was open and that there was enough light in the bedroom for him to see the twins in their cots. That he couldn't see the bed occupied by Madeleine, but as it was all quiet, he deduced that she was sleeping. That the light was not from an artificial source inside the apartment, but perhaps something coming from outside through the bedroom window. That it seemed to him that the shutters of the Master' bedroom window were open without knowing if the window was also open.If he exited back through the patio doors on his way to check the other apartments would he have walked past the window where the children were sleeping and seen the shutter?