Do you have acite for...Door would be too heavy for her
Oh really you’re asking me for a cite now.

I quote this and believe it was possibly during that Woman’s Hour interview , after the last line .
Jenny: 'What was your first thought, what did you think immediately had happened?' (Upon discovering that Madeleine wasn't there)
Kate: 'Well, obviously I kind of looked and double looked and, errm, you know, obviously, there was twenty seconds of, you know, she must be there (laughs). Errm, but there was no doubt in my mind within (laughs) probably thirty seconds, errm, that Madeleine had been taken from that room. I can't go into the reasons why I thought that but it was... no doubt whatsoever. And Madeleine wouldn't have walked out herself. I know that.
So she had said the patio door was left unlocked so Madeleine could get out , then here contradicts it by saying she wouldn’t have walked out by herself . I remember too a heavy curtain being mentioned .