My two cents...
I felt that Kate was remarkably calm throughout all this. I dont know many mothers that wouldnt be so horrifically distraught at the idea that their child could be taken, let alone if it actually happened. Perhaps she was medicated to calm herself?
We all, who have children, know how they can push our buttons when they are that age where they are too old to always accept being told and too young to reason with. Add that to frustration that you are trying to spend the evening with friends and had copious amounts to drink and the heat.....potential for a posible fatal accident? or accidental over sedation (though unlikely unless they carry meds on holidays?)
When I left my 12 year old son, I was told by my doctor that he was really too young to be left on his own in my house. Here, there are qualified professionals, leaving 3 children under 4, alone in a property in another country. They were, if they are to be believed, too far from the place to notice someone taking a child from their apartment, or hear it screaming at being woken up and taken, or notice her (in this case) leaving the property and wondering off in a place where she (maddie) may not be able to find an english speaking person to help her. IMO they were not watching their children, they had left them alone. That alone makes them responsible. If I left my child and something happened to him, social services would hold me responsible and I would be in a 'negligence' situation.
The fact DNA has been found in the hire car is too suspicious for me. Hair in the boot well? Im pretty sure that this model has a carpet and a sound reduction layer before even getting to the boot. Unless they changed the tyre and cleaned the childs hairbrush it is impossible for hair to get there!
She washed the teddy. Seems a strange thing to do. That teddy would have smelled like her child, even after coming back from the police. Unless they soaked it with chemicals etc?