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No parents are going to give up when they're child unless they know for certain that child's there, then we just don't have it any evidence.

My height is not as bad as it was last year.

It was almost 10 years ago.

I mean, probably in those first 48 hours, nothing actually has changed since then.

I think the difficult thing has always been how will we find, you know, because you rely on the police doing everything they can

and you rely on somebody with information coming forward.

According to the McCanns and their friends, every half an hour or so, somebody from the group was going to check on their own children.

Now, the McCanns children were all in the same room, which was the front bedroom of the apartment.

The patio doors here were left shut but unlocked and then there's the journey through here to the children's bedrooms.

You'll see Madeline was in this bed here, the twins in the cuts in the middle.

The important thing there is the cabinet can says that when she came up to look that this door which should be left just a jar was wide open.

Yes, it was 10 p.m. when Kate made that final journey back to the apartment.

It was her turn to go and check on the kids crucially.

There was no sign of Madeline.

Hello and welcome to Real Crime Profile.

This is Jim Clemente, retired FBI Profile of Form and New York City Prosecutor and writer producer for CBS's Criminal Minds.

With me today is...

Laura Richards, Criminal Behavioral Analyst, former head of the Homicide Prevention Unit and new Scotland Yard and founder of Paladin National Stalking Advocacy Service.

I am Lisa Zambetti, I'm the casting director for CBS's Criminal Minds.

I have a real interest in real crime and these minds that solve these crimes.

We are deep diving and we're continuing to deep dive the disappearance of Madeline McCann who disappeared just one week short of her fourth birthday in Portugal on May the 3rd, 2007.

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