OK they don't ask for tests to be done directly, but ask "have you any evidence?" which is sort of asking "have you done any tests?" And if they haven't done tests they could go and do tests to answer the question. It would be something to do with "who is running the investigation?". So the British would only ask in an indirect fashion which allows for this confusion.
All I say about Silvia is that she had a conflict of interest. I then show how the conflicts could be manifestly demonstrated. OK it is always going to be hypothetical unless she was to admit to it. I am hoping SY or the PJ will reopen the case and question her on this aspect.
It is not too late to investigate whether there was a conflict of interest and whether it had any bearing on the case.
It's interesting to look at the question the liaison officers were replying to;
Was there anything done or said by Kate or Gerry McCann in your presence or during various contacts that could raise any suspicion that they could have had any knowledge of what could have happened to Madeleine, beyond the circumstances described to the Portuguese investigators.
Answer 1;
Kate revealed that Madeleine had spoken with her in the morning of her disappearance and said that she remembered the twins had cried during the night and that she wanted to know why neither her mother or father had appeared. Kate asked herself whether this fact could have any relation with Madeleine's disappearance.
Gerry and Kate also questioned whether there was any suggestion that pointed to the use of drugs to facilitate Madeleine's abduction.
http://www.mccannpjfiles.co.uk/PJ/JIM_McGARVEY.htmAnswer 2;
One of these questions was that they wanted the PJ to be aware of was Madeleine's revelation about Wednesday night, when she said that she was left alone during the night. She told Kate and Gerry that she remembered the twins crying and that she wanted to know why neither her mother nor her father had gone to the room to see what was happening.
They also wanted to know whether the PJ had any evidence that would suggest that the person who took Madeleine had used any substance to facilitate the abduction.
http://www.mccannpjfiles.co.uk/PJ/STEPHEN_MARKLEY.htmAre the liaison officers saying that the McCann's questions might be a sign that the McCanns could have had
knowledge of what could have happened to Madeleine? That was the question they were responding to.