You are quite entitled to think this is an open and fair investigation Montclair.
I just don't believe it is the case.
Now if SY had said at the start that all possibilities would be investigated, then fair enough, I would have no problem, but they never have, and like many other people I don't believe this case will be solved.
I would like to be proved wrong.
SY DID say at the start that all possibilities would be investigated. What do you think they meant when they said 'Madeleine could be alive or sadly dead' ? That they would investigate both that she could be alive or that she could be dead.
They did a search and a dig, to see if Madeleine could have been murdered and buried but found nothing.
We don't know where the investigation has taken them now, as nothing has been reported and rightly so, why should they have to give a step by step report about what they are doing?
It could be they know what happened to Madeleine but need proof.
When were the 30 letters sent? You don't know they could have been sent at the start of the investigation or more recently, could be they are looking for someone, who knows.
Until SY finishes their investigation no one will know if it has been fruitless or not, so I would save your negative thoughts until we have been given the whole picture.