This one from 1751 in England: Mary Blandy, who poisoned her father with arsenic at the behest of her boyfriend. She admitted having done this but claimed her boyfriend had told her the arsenic was a magical powder that would make her father like him and allow the couple to marry. One of those “truth is stranger than fiction” things. To this day, opinion remains divided as to whether Mary Blandy was really that much of an idiot, or whether she was a conniving murderess, or something in between.
Counting this one, I actually have six Executed Today entries running this month. I’ve got one tomorrow, and on the 13th, the 15th, the 25th and the 27th. What fun!