The Court of Appeal has upheld Mark Lundy's convictions for the murders of his wife Christine and daughter Amber.
Lundy had twice been found guilty of murdering his wife and daughter and went to the Court of Appeal in October last year in an effort to have his 2015 convictions overturned.
The bodies of Christine Lundy (38) and Amber (7) were found by Mrs Lundy's brother in their Palmerston North home on 30 August 2000. Both had been bludgeoned to death.
Lundy was first convicted in 2002 but the convictions were set aside on appeal to the Privy Council.
He was tried again in 2015 and it was those convictions that were under appeal.
All but one of the grounds for appeal were rejected in a decision released today.
Lundy had argued there were significant omissions from the judge's summing up in the 2015 retrial and that the Crown's case in the retrial had changed compared with his first trial.
At the first trial the Crown suggested he had driven at break-neck speed from Wellington to Palmerston North, killed his family and driven back to Wellington.
However, at the retrial in 2015 it said the deaths had occurred early on the day the bodies were found.
During the appeal Lundy's lawyers said they had only been made aware of that change in the Crown's case shortly before the retrial began, but the Crown lawyer said the defence had known about it since 2014.
The defence also claimed the jury may have indulged in 'demeanour reasoning' based around claims that funeral footage showed Lundy 'feigning' grief.
Lastly the defence said the jury was 'drowning in a sea of science' and should not have had the mRNA evidence before it.
Messenger RNA, or mRNA, is similar to DNA but allows a scientist to pinpoint which part of the body a particular piece of tissue is from.
The Court decided that the mRNA evidence was inadmissible.
In its decision the court said a number of specific issues were raised for Lundy but, having considered them, it had determined that none, on their own or collectively, undermined the strength of the Crown case.
"The Court is sure of the guilt of Mr Lundy notwithstanding the rejection of the mRNA evidence," the decision read. "It is also satisfied the trial was fair."
Timeline of Lundy case
• August 2000: The bodies of Christine and Amber Lundy are found in their Palmerston North home. They have been bludgeoned to death.
• February 2001: Mark Lundy arrested and charged with their murders.
• March 2002: Mark Lundy convicted of the murders and sentenced to life in prison with a 17-year non-parole period, increased to 20 years on appeal.
• October 2013: Privy Council overturns Mark Lundy's conviction, saying it was based on unsafe evidence, and he is released on bail pending a retrial.
• February 2015: Mark Lundy's retrial starts in the High Court at Wellington.
• April 2015: Mark Lundy found guilty of murdering his wife and child. He returns to prison to continue serving his life sentence, with a 20-year minimum non-parole period.
• October 2017: Mark Lundy's lawyers go to the Court of Appeal to challenge the convictions.
• October 2018: Court of Appeal dismisses Mark Lundy's appeal.
