Ian Bailey has lost on most grounds of his appeal against his failed High Court action over an alleged garda conspiracy against him.
The three-judge Court of Appeal ruled the High Court judge was correct to dismiss most of his case because the claims had not been lodged within the six-year time limit required by law.
However the appeal court found in favour of Mr Bailey in respect of one issue relating to the release of information by gardaí prior to a defamation case taken by Mr Bailey in 2003.
The court ruled that issue should be retried.
Mr Bailey took a libel action against a number of newspapers in 2003 after he was named as a suspect in the murder of Sophie Toscan Du Plantier.
He lost that case in the Circuit Court but he appealed to the High Court where the case was settled and the terms undisclosed.
He maintains gardaí improperly disclosed information from statements of a key witness, Marie Farrell, to the newspapers in advance of the libel hearing.
The Court of Appeal said this issue was not statute barred and should be submitted to the High Court for re-hearing.
Mr Bailey had submitted more than 17 grounds of appeal, many of which related to rulings by the trial judge, Mr Justice John Hedigan, during the five-month long trial in 2014 and 2015.
Mr Bailey had sued An Garda Síochána and the State for damages.
Ian Bailey says he's reasonably pleased with today's Appeal Court ruling pic.twitter.com/WH0wyhYZOZ
— RTÉ News (@rtenews) July 26, 2017
He claimed he was wrongly arrested on suspicion of the murder of Ms Toscan du Plantier at her holiday home in Schull in west Cork in 1996.
He also claimed some gardaí had conspired to frame him for the killing.
Most of his claims were struck out on day 62 of the case following a ruling by Mr Justice Hedigan that they were not made within the six-year time limit required by law.
A claim that certain gardaí were involved in a conspiracy against him was allowed to go to the jury.
Jurors found against Mr Bailey after almost two hours of deliberation.
Mr Bailey was ordered to pay the multimillion euro legal costs associated with the case.
A stay was put on the costs order pending the outcome of this appeal.
Mr Bailey has always denied being involved in the murder of Ms Toscan du Plantier,
whose body was found outside her home on 23 December 1996.
Earlier this week the High Court refused a second application by French authorities to have him extradited to face trial in France.
The judge in that case said the application was an abuse of process.
In March, lawyers for Mr Bailey told the Court of Appeal that the trial judge's ruling, withdrawing most of Mr Bailey's case from the jury was too narrow.
They said Mr Bailey's allegations of a conspiracy went beyond the gardaí named in Mr Justice Hedigan's ruling.
They also said there was ample evidence of conspiracy, which should not have been ruled out by the judge's decision that most of Mr Bailey's case was outside the legal time limits, but which was not put to the jury.
In its judgment today the court ruled that while it may have been more satisfactory for the time limit claim to have been raised earlier in the case, nevertheless the claims were statute barred.
Mr Bailey's lawyers also raised concern about a warning given by the trial judge to Ms Farrell in front of the jury in relation to perjury.
However the court ruled that even if he was wrong to do this in front of the jury, the judge had been at pains to stress that the assessment of her credibility was a matter for the jury.
The appeal court also agreed with the trial judge's ruling to exclude certain evidence from fomer DPPs Eamon Barnes and James Hamilton, a senior official from the DPPs office and an expert witness on police practices.
