oh come off it wannabe, if one of your mates mentioned to you that her child was dead and she needed to cover it up, would you agree?
That supposition rests on the assumption that the friends of the McCann's are all mad.
Which might be possible I suppose. Let's be open minded and rule nothing out.
Re DNA, someone else pointed out further down the thread (or perhaps on another one) that blood can be on clothing from a nose bleed, falling over and grazing a knee, etc. dna traces can also be transferred from shoes, clothing etc. Just because someone's dna is found in a certain location, doesn't mean that person was in that location - it can mean that something which was in contact with them was in that location, if I understand it correctly (which perhaps I don't, I'm not a scientist).
DNA evidence is not foolproof