Erin Patterson's conviction for the deaths by poisoning of her estranged husband's relatives has prompted fevered speculation across Australia about her motive.

Erin Patterson has been found guilty of murdering three people with a toxic mushroom lunch following a marathon ten-week trial in Victoria. Justice Christopher Beale sent the jury to deliberate last Monday, urging them to resist feelings of bias.

Emergency doctor tried to get mushroom cook to stay at hospital for treatment but Erin Patterson left, despite seeing her severely ill in-laws.