A doctor who treated some of the victims of the 'mushroom murderer' explains the moment he realised Erin Patterson committed the deadly crime.

The fact she had no clear motive was central to her defence team’s arguments. Patterson, who foraged wild mushrooms in her spare time and also ate the beef wellington, claimed that the event was a tragic accident.

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