Person
Hélène Jégado
French domestic servant and serial killer
Hélène Jégado (1803 – February 26, 1852) is a French domestic servant and serial killer.
She is believed to have murdered as many as thirty-six people with arsenic over a period of eighteen years.
After an initial period of activity, between 1833 and 1841, she seems to have stopped for nearly ten years before a final spree in 1851.