Serial poisoner Hélène Jégado is arrested in Rennes, France, on July 1, 1851.

Later inquiries link her to twenty-three suspected deaths by poisoning between 1833 and 1841, but none of these are thoroughly investigated since they are outside the ten-year limit for prosecution and there is no scientific evidence.

Local folklore has attributed to her many unexplained deaths, some of which were almost certainly due to natural causes.

The most reliable estimate is that she probably committed about thirty-six murders.

Although there is not much information stating why she committed these crimes, it can generally be linked to psychological issues.

Jégado once stated that murdering people gave her a sense of power, which she enjoyed.