A lawyer representing the family of Sophie Toscan du Plantier - the French woman murdered in Co Cork in 1996 - has said the family was astonished, disappointed and furious over the latest delay in the investigation.
Last week, Ian Bailey's defence team told the Supreme Court that new information had come to light, which they said revealed 'significant garda misbehaviour' in the case.
The case was then adjourned.
Mr Bailey denies any involvement in Ms du Plantier's murder.
Speaking from Paris, lawyer Alain Spilliaert said Sophie Toscan du Plantier's family had been fighting for 15 years to get justice.
He said it was simply incomprehensible that new documents - which were in effect old documents - were presented to the court and then everything was postponed.
Mr Spilliaert questioned the necessity of releasing the documents now and also why it was done at the last minute - the day before the extradition was to be heard in the Supreme Court.
The lawyer said the Supreme Court had to consider a major public issue - is it possible for a judge in France to issue a European arrest warrant against someone for a crime that has been committed in Ireland.
He said grievances against the gardaí were simply not relevant to the point.
He urged that the delay be short, saying time was the enemy here.
