Labour has called for a judicial inquiry into First Minister Alex Salmond's stance on an independent Scotland's position in the European Union.
The call comes one week after his deputy, Nicola Sturgeon, revealed that taxpayers' cash was spent to keep the public from knowing that no "specific" legal advice had been taken in the first place.
Mr Salmond was accused of being a "barefaced liar" as opposition MSPs insisted that the SNP leader gave the impression in a television interview that advice existed to back the assertion that Scotland would automatically remain in the EU after a 'Yes' vote in 2014.
Labour leader Johann Lamont has now deepened the row at Holyrood by demanding a wider investigation into Mr Salmond's conduct than one under the terms of the ministerial code, which is already under way.
"This isn't about his future, it is about the future of Scotland, and Scotland deserves better," she said.
"That is why today I am calling for a judicial inquiry into the First Minister's handling of this affair from the beginning. An inquiry into the basis on which the First Minister did ever assert Scotland would automatically be a member of the EU.
"What made him say that this separate Scotland would not have to adopt the euro? An inquiry into why he said he'd sought advice from law officers when he had not.
"No amount of bluff and bluster will stop us seeking the truth."