Victoria's highest court has dismissed a bid by media outlets to lift a suppression order over secret evidence in the Erin Patterson case.
The judges said, if published, the material would leave an "indelible impression" in the minds of jurors if Patterson was granted a re-trial on appeal.
The suppression order will lift if Patterson fails to apply for special leave to appeal to the High Court by November 27.
Evidence in the Erin Patterson case that would receive "massive publicity" remains suppressed by Victoria's courts, three years after she murdered her relatives with a beef Wellington laced with death cap mushrooms.
Last month, three judges of Victoria's Court of Appeal threw out Patterson's appeal against her convictions and changed her jail term to a life sentence without parole.
However the judges refused to lift a suppression order over a piece of evidence, in case Patterson succeeds in a last-ditch appeal to the High Court and is granted a retrial.
In a partially redacted judgment published online, the Court of Appeal said there was a danger Patterson would face "unfair prejudice" if potential jurors knew about the evidence.
"While the evidence is nuanced and complex, it would be likely to attract very significant publicity with the potential to cause a real and substantial risk of prejudice to any future trial,"…
