I’m currently with my mushroom foraging partner near Canada doing thimbleberry picking (got stung 16 times today grrrrr) but my family uses dehydration often and I’m a huge fan of jarring/preserving and mushroom powder etc, and because of this I’ve been discussing this case with my fam extensively.
Warning- speculation!!
Perhaps before her ex got sick in May she procured a batch of deathcaps, then dried, jarred, fed to her ex and as it did not work she later used the rest at the lunch? The only traces remaining by the time of the inquiry would have been in the dehydrator, which she had to throw away and they couldn’t find in the home.
Jmo thanks for reading!