For years, from behind a computer screen, Erin Patterson built up a reputation in an online true crime community as a "super sleuth". Today, she herself has become a true crime obsession.

Erin Patterson remained composed as a jury decided whether a poisoned beef Wellington lunch she cooked was a deliberate and callous act of murder, or a tragic accident.

Criminal experts have described mushroom killer Erin Patterson as a ‘formidable witness’ who ‘knew what she was doing’.