Chicago's 1920s poison murders: Tillie Klimek allegedly killed up to seven people, including four husbands, through arsenic poisoning between 1914 and 1921, rivaling organized crime in newspaper headlines. Her murder trial exposed a shocking conspiracy involving multiple women and dominated city papers for years. Tillie Klimek collected life insurance payouts after each husband's death, establishing a clear financial motive for systematic poisoning over seven years.