Death by potato fruit.
I vaguely remember an AC short story, where someone hires someone to kill a child (a matter of inheritence, I think), and a lady persuades the child to eat some potato fruit, which has a poisonous amount of solanine in it, and the child dies. Does anybody remember the name of the story? I'm interested because several members of my family are sensitive to solanine (which exists in tomatoes, potatoes, peppers and eggplant) and can't eat these vegetables at all - but if I remember correctly, potato fruit is the most poisonous, and what we actually eat is the roots.