I think Dianne Webster needs a separate thread actually:
Why is she trying the shutters out?
"She states that
KATE had repeatedly commented that, on arriving at the bedroom, she had found the window of the room, with its shutter, both open." Dianne tampered with the crime scene. Crack on I'm not stopping you

Fiona wouldn't touch that shutter. She arrived at the apartment after Dianne had tried raising the shutter.
1485
'What did you see when you walked in, describe it''
Reply
'At that point, Gerry, I don't think was in the apartment, it was mainly Kate. And Kate was just, huh, utter disbelief and I had disbelief, thinking she's got to be here, you know, what, how can this have happened. And by that point Kate was already saying that the, what she'd found when she'd gone back, which was that the, she'd found the window open and the shutter open and she was convinced at that point that somebody had taken, taken Madeleine and that's what she was telling me and I was like 'They can't have done. They can't have done this', you know. And I looked, I looked throughout the whole apartment and I looked in all the cupboards, under the drawers, under the beds, behind the curtains, everywhere, erm, just, you know, trying to, knowing it had already been done, but you just do. Erm, tut, I looked, when I went into the room that Madeleine was sleeping in, the room was dark, Madeleine, erm, Madeleine's bed was sort of folded back, the sheets, quite kind of neatly really, erm, Sean and Amelie were fast asleep in their cots, they didn't stir, you know, I was opening the cupboards in the room and moving around the room, they didn't stir at all, which that was, that was odd. Erm, we were trying to ascertain whether Madeleine could have got out, and I've already said earlier the shutters were very heavy, and I was almost trying to convince Kate that she could have opened the shutter and climbed out, although knowing that wasn't a likely thing, but at that point we were just trying to pacify Kate in that Madeleine was going to be alright. Erm, and I, I think I touched the webbing in that room, but because Sean and Amelie were asleep, I didn't actually open the shutter in that room, we went, I went to the front of the house and I was trying to lift the shutter at the, at the back, just to prove whether, you know, whether it could have been opened and whether Madeleine could have opened it from the inside'.
00.50.31
1485
'And''
Reply
'I mean, it was fairly obviously, I think, that that wasn't what had happened and what could have happened'.
http://www.mccannpjfiles.co.uk/PJ/FIONA-PAYNE-ROGATORY.htm