Helene Jegado was born in 1803, and she was trained as a domestic servant at an early age. Like most women, Jegado poisoned her victims with arsenic.
Her first suspected poisoning was in 1833. Seven people died over three months, including a priest and Jegado's own sister.
Due to a recent cholera outburst in the area, no one suspected anything. In 1850, she poisoned several servants in another household.
When the doctors requested an autopsy for one of the victims, Jegado declared her innocence out of the blue, before she was even suspected.
She was arrested and tried in 1851 but was accused only of three murders, three attempted murders and 11 thefts.
Jegado denied all accusations but was found guilty, sentenced to death by guillotine, and executed in 1852.
