The November 29 1954 edition of the Toronto Daily Star contained a horrifying story about a woman who had murdered four of her five husbands and possibly a number of her relatives.
There is a Wikipedia entry for Nannie Doss – in total, she killed four husbands, two children, her two sisters, her mother, a grandson, and a mother-in-law. The All That’s Interesting website has a page about her, as does Murderpedia.
Toronto Old News 