This thread is too long to read all of it, but if anyone is interested, there was a (very unprofessional) member of the McCanns' legal team sitting in my train carriage today discussing the case on his mobile. The 'evidence' in the boot of the car is a small clump of hairs with some type of body fluid, possibly blood but maybe not, in them.
That doesn't sound to me like conclusive evidence of anything. I'm sure there are loads of ways that could have got there - I think one poster suggested a hairbrush, for example.