Mushroom murderer Erin Patterson is challenging her conviction on seven grounds, taking issue with jury management during deliberations and "oppressive" prosecution questioning while she gave evidence in her trial.

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The 51-year-old was convicted and jailed for life in September with a non-parole period of 33 years after being found guilty of murdering her former in-laws, Don and Gail Patterson, 70, and Gail's sister Heather Wilkinson, 66.

A jury found she deliberately served beef Wellingtons laced with death cap mushrooms to her lunch guests in

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