So what did The UK Police do to Sr. Ribeiro in the absence of The PJ?
From what I have seen he agreed to talk to a UK Journalist, and it was a bit painful. But there was an Interpreter present.
And being a bit short of marbles isn't a reason for not interviewing him.
The process he would have gone through at Faro would have been a variant of that used re Kate and Gerry, but somewhat more tortuous.
In that room there would have been Sr Ribeiro, his lawyer, probably at least 2 PJ officers, probably at least 2 OG officers, a translator, and possibly a support staff. Somewhere around 7 strangers. Then the little matter of 250 questions, and handling the language translation.
He had travelled from Luz to Faro the day before, but had to hang around to the next day before starting. Most people would find such an interview somewhat stressful. It is pretty obvious from the Panorama episode that Sr Monteiro would find it more than somewhat stressful.
The Panorama interview was the BBC presenter, a translator and a video man. It was on Sr Ribeiro's home turf, near to where he lives, he hadn't just been made an arguido, and it wasn't 250 questions long. But it was still clearly stressful.
Is this man fit enough to be part of a burglary team? Has this man been keeping secret the truth behind the disappearance of Madeleine McCann for the last 10 years?