Court of Appeal reveals reason it quashed Wayne Montaperto's 1988 convictions

The Court of Appeal has released the reasons why Wayne Montaperto's convictions were quashed. Photo / File

The Court of Appeal has released its reasoning for quashing child abduction and sex-related convictions for a Napier man police wrongly suspected of having killed schoolgirl Teresa Cormack.

Wayne Montaperto, now aged in his mid-60s, was convicted of kidnapping four children and doing an indecent act in a trial at the High Court at Wellington in 1988.

However, he has always maintained his innocence.

In October 2018, his lawyer successfully petitioned the court for a Royal Prerogative of Mercy and it was sent back to the Court of Appeal.

The appeal was based on the fact that a juror in the 1988 trial had told fellow jurors Montaperto was "prime suspect" in the 1987 murder of 6-year-old Teresa Cormack.

The information only came to light in 2008, when the jury foreman contacted Montaperto's counsel to say he had received information during the appellant's trial linking him to the Cormack case.

The juror said he was made aware of the connection by a work colleague who had two brothers who were police officers.

The juror maintained however, that the jury's decision has been reached on evidence alone.

An inquiry of the jurors was directed by the Court however, only six of the 12 could be contacted, some having died in the three decades since the original trial.

Of those spoken to, two did not believe Montaperto's link to the Cormack cases had come up during trial and another two recalled being made aware of that fact possibly during the trial.

Justices Peter Kos, Forrest Miller and Patricia Courtney said it was sufficient to amount to a miscarriage of justice if just one juror was "infected".

"But here there was a credible basis to say that other jurors had received the information, and an adverse impact on their weighing of the evidence could not be excluded," their decision read.

Although the information was passed on to other jurors "ignorantly and naively, rather than maliciously", the Justices found the information was highly prejudicial having come from police officers.

"It was more than rumoured connection."

The Justices found that a "clear case of apprehended jury bias" had been established and that the verdicts were therefore "unsafe".

"We have found this case involves the transmission of materially prejudicial extraneous information to the whole jury.

"We are satisfied that this transmission created a real risk of miscarriage of justice.

"The appellant did not receive a fair trial.

"The verdicts entered in 1988 were unsafe and must be set aside."

No new trial was ordered given the amount of time and that Montaperto had long since served the sentence imposed.

The convictions were quashed on April 22, this year.