To anyone here that still thinks that Erin was merely trying to make her lunch guests sick, I suggest that you read this. Erin is a person who does her research.
The Deathcap Mushroom - Amanita phalloides, identification, emergency phone number, one of several illustrated pages introducing Australian fungi.
www.anbg.gov.au
If we say that Erin is guilty, there are 2 main theories: that she intended to kill them all or that she didn't intend for them all to die and that some would only get sick.
The reality is that with what we can ascertain about Erin from the evidence both of these propositions contain problems that have to be accounted for.
1) Erin was very clever and thorough, and would surely have done her research about DC.
2) Erin would have surely known that she couldn't explain away the sudden mysterious deaths of 4/5 people.
It goes without saying that if guilty either could be true. I'm only assessing what I think is more likely.
I find number 2 much more problematic. Until Erin took the stand, I would probably have said it didn't meet the requirement of reasonable doubt because of reasons around this. There is a serious lack of motive to murder these specific 4 people IMO. Then you factor in that she panicked afterwards and tried to dispose of evidence in a way that seems unlikely with a planned-out murder.
With number 1 we actually have good evidence that Erin isn't necessarily always extremely thorough. She mistakenly thought the Enrich clinic did gastric-band. If she's guilty, she's had months to create this alternative scenario and make it water-tight. She didn't even look at the website to check if it really did.
My running theory is that from the searches in 2022, Erin had a knowledge of DC and made the assumption that they were 10-30% lethal based on the headline information. She was then on inaturalist one day and noticed that they were available and saw it as an opportunity. Throughout this period, she never questioned the original assumption.