Just to correct one point in your post.
You are pre-judging SY, not judging them as you have nothing to judge. You do not have the remotest idea what they have found so far as they have not chosen to share all their information.
They appear to have found out one thing for certain. And have stated that fact very clearly. That finding is that neither the McCanns, nor their friends are suspects or persons of interest.
You choose to disbelieve the Police. I prefer to wait for their findings.
It is not up to the McCanns to prove they have told the truth. Your abysmal understanding of law shines through that ridiculous claim you make about them. When that is allied to your inability to believe what the police tell you, it suggests you should get a better understanding of law and a better sense of proportion in dealing with UK police forces.
And then you go completely OFF TOPIC by resorting to your mantra of parental blame. You don't agree they exhibited parental responsibility and cannot get that fixation from your mind when discussing the other matters can you. It is not the topic of this thread. If you wish to discuss it then do so on a thread of your own. If you continue to attempt to discuss it here it will be blindingly obvious that you are trying to disrupt and that you cannot manage to discuss the topic of the thread at hand.
Now do you have any evidence of the McCanns being involved in any crime (against their daughter or any other crime at all)?
Another inane set of responses.
The SY police are far from foolproof.
Their history is littered with flawed cases, but you already know that.
You can prevaricate until the end of time,but it is solely the mccanns responsibility , that they left their children unprotected and in peril. This is the catalyst which led to Madeleine's disappearance. In all probability, they would have been charged with neglect if it had occurred in the UK.
As to the way the law works, I don't need any lectures from you.