http://www.channel4.com/news/articles/world/mixed+messages+in+mccann+probe/805177
~snippet~
"A Portuguese newspaper reported that a high-ranking officer in the Policia Judiciaria (PJ) - Portugal's CID - said the evidence was not even strong enough to prove whether Madeleine is dead.
It is now 135 days since the the four-year-old vanished from her bed in her family's holiday apartment in the Algarve resort of Praia da Luz.
The unnamed PJ officer told the 24 Horas newspaper: "We have nothing concrete. There are a lot of indications, but without more elements it's impossible to determine what happened in those four vital hours in the case (between 6pm and 10pm on the night Madeleine vanished).
"Even if the blood and traces gathered in the car or in the apartment were confirmed to correspond 100 per cent to the little girl's DNA, that wouldn't prove anything.
"Those elements could only confirm - and that doesn't even happen - that the little girl was in the apartment (which is obvious) and in the car.
"In either of the cases nothing would prove homicide, just that the body of the little girl had been transferred in the vehicle."
~continues~
I think the word "concrete" is a bit misleading. Seems like, in this context, concrete means
absolute proof. Many a case has been tried without absolute proof.
IMHO.