Erin Patterson, the Australian woman sentenced to life for the mushroom murders, has formally filed a legal challenge opposing the guilty verdicts.
The fifty-one-year-old was determined to be culpable of murdering three relatives and attempting to murder one more individual with a lethal mushroom-based lunch at her home in Victoria state in that year.
Under Australian law, appeals are not an automatic right, and Patterson's legal team needed to persuade the Court of Appeal that there might have been judicial mistakes in the legal process.
Patterson's appeal was officially lodged on Monday, after the court gave her attorneys permission to dispute the findings.
The reasons behind the challenge remain undisclosed.
Throughout the 11-week trial, Patterson repeatedly stated she was not guilty, claiming that it had all been a terrible accident, and she didn't deliberately add toxic mushrooms in the Wellington dish she cooked and served for dinner.
Her relatives by marriage Gail and Don Patterson, both 70, and the sister Wilkinson, sixty-six, passed away following the food.
The spouse Wilkinson, a clergyman, pulled through following recovery from a coma, and has persistent physical complications connected to the toxic exposure.
Once seven days of consideration passed, the panel of 12 jurors delivered their unanimous decision - culpable for every count.
She was given one of the longest ever incarceration periods imposed on a female offender in Australia - imprisonment for life, with no possibility of freedom for a minimum of thirty-three years.
That signifies Patterson is likely to be in her elderly years when she might request release.
She now has the chance to challenge the jury's conviction.
The 28-day window to submit a challenge expired on 6 October, however an updated legal provision, providing attorneys additional days without needing to explain why, allowed her attorneys additional time to lodge the paperwork.
There was intense public interest in the toxic mushroom case, and widespread press attention swirled around the modest courthouse in the rural community of Morwell while the case was heard.
Throughout two months of witness accounts, the jury heard evidence suggesting Patterson had collected death cap mushrooms in nearby towns and enticed those affected to the fatal meal under the false pretence that she had cancer - prior to attempting to hide her crimes by providing false statements and disposing of evidence.
Her estranged husband, Patterson, had also been invited to the gathering but cancelled at the last minute, partly because he thought that his spouse had been seeking to intoxicate him for an extended time.
Following the trial, information emerged that he had become severely unwell post ingestion of several of her meals earlier that he experienced unconsciousness, much of his digestive tract was removed through surgery, and his family had been told to bid him farewell multiple times as he was not expected to survive.
Patterson is currently in a women's high-security facility - the Dame Phyllis Frost Centre in Melbourne.
When the sentence was delivered, the presiding judge told the court she remains for 22 hours a day in her prison room, with no contact with other detainees due to her "major offender status".
The justice observed that Patterson's reputation and the extensive attention in the incident suggested she might "continue being an infamous inmate for many years to come, and, consequently, continue facing substantial danger from other prisoners".
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