I'm sure the Portuguese would have no problem if OG decided to release the evidence ruling out the parents and their friends. According to Rowley that evidence can be found in the original investigation files which aren't subject to Judicial secrecy.
Madeleine McCann: Police confirm Portugal 'activity' BBC News
6 May 2014 Last updated at 20:02
No media updatesA letter was sent to media editors amid speculation about excavation work. Mr Rowley asked them to "think carefully" about information they published.
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Mr Rowley said he had discussed the case with his opposite number in Portugal and highlighted the "high levels of interest" the activity would generate in the British media.
He said Portuguese police did not provide the media with updates on ongoing investigations.
Activity would cease if police in Britain gave out information or news reporters caused any disruption to their work in Portugal, he added.
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AnalysisRichard Bilton
BBC NewsMr Rowley urged the media to avoid speculation; to think of the impact it might have on the investigation.
That is because the Portuguese police and not the British will carry out any work in Praia da Luz. British officers will simply be observers. Without the co-operation of the Portuguese Policia Judiciaria, the British efforts will not get far.
The relationship between the forces has been difficult at times. Officers in both countries have told me of their frustrations. Both have active and separate investigations. Leaks and speculation could fatally undermine their co-operation.
It seems an upsurge in police activity is about to start. If it is to be successful, this sometimes uneasy relationship will need to survive.
http://gerrymccannsblogs.co.uk/Nigel/id485.htm