Seems like a very common cause of this kind of problem is posion mushrooms that "look like" safer varieties. Every now and again you hear about a group of recently arrived Hmong or other Asian group that eats what look like familiar shrooms that turn out to be toxic twins.
I would never eat a mushroom in the wild unless under the guidance of C2 or other expert mycologist.
Hammond
"Don't you ever underestimate the power of a female." Bootsy Collins