During the 1880s in Liverpool, England, sisters Catherine Flannigan & Margaret Higgins poisoned their family members in an attempt to claim insurance payouts.
Both women pleaded guilty and were sentenced to 24 years in prison. Petersburg, Florida, Dudley (a registered nurse with Münchausen syndrome by proxy) murdered 12 nursing home residents by overdosing them with insulin injections.
Sylvia Seegrist – Driven by a rage from untreated schizophrenia, Sylvia Seegrist opened fire on innocent shoppers in a Philadelphia-area mall in 1985. Christina Marie Riggs In 1997, in Sherwood, Arkansas, Riggs smothered her own children and attempted suicide afterwards. She was found guilty of second degree murder and was sentenced to 65 years in prison, but died in prison during her sentence.
She was sentenced to death in 1920, but was released from prison after 11 years and lived the rest of her life as a cisgender woman.
Genene Anne Jones – In Kerrville, Texas, the pediatric nurse killed as many as 46 infants left in her care between 19. However, due to developments in the case since this episode originally aired, she may be released as early as 2018.
Báthory, who became known as the "Blood Countess", was imprisoned in 1609.
In Romania during the 1920s and 1930s, Vera Renczi poisoned her husbands, lovers, and her son with arsenic before placing their bodies in zinc-lined coffins in her wine cellar.
In New Orleans during the early 19th century, French socialite Delphine La Laurie beat, tortured, and performed medical experiments on slaves in the basement of her mansion.
In the state of Washington, Linda Burfield Hazzard, a quack doctor and a self-proclaimed "fasting specialist", believed she could heal her patients through exhausting diets and starvation.
Each of the three original episodes covered the cases of various groups of women who were united by the central theme of the episode.
These three episodes of the show were narrated by Marsha Crenshaw.
Blanche Taylor Moore used arsenic poisoning to kill people close to her for over 20 years.