Question: Name the American female serial killer, who after her arrest confessed to 33 murders, and who with only Lydia Sherman and a farmwife in rural Catawissa accused of murdering 17 members of the local community completes the trio of American female serial killers?

Context articles: Dark Angel (2016 TV series)
Diane O'Dell
Hilda Nilsson
Female Serial Killers
Huang Yong (murderer)
Lyda Southard
Peter Vronsky
Jane Toppan
Serial Killers Ink
Bertha Gifford

Dark Angel is a British two-part television drama miniseries, based on the adaptation of the book "Mary Ann Cotton: Britain's First Female Serial Killer" by David Wilson.
 The series was broadcast on 31 October and 7 November 2016, and starred Joanne Froggatt as protagonist Mary Ann Cotton, widely regarded as Britain's first female serial killer, who was found guilty of murder in March 1873 for the murder of three of her husbands, allegedly in order to collect on their insurance policies.
Diane O'Dell (born 1953) is an American female serial killer that was convicted of murdering three of her 12 children.
 She was also investigated for the disappearance of another child.
 O'Dell regularly traveled with the bodies of the corpses.
 The bodies of the three dead newborns were found in May 2003 in a storage shed O'Dell rented and abandoned in Safford, Arizona.
Hilda Nilsson (1876 – 10 August 1917) was a Swedish serial killer from Helsingborg who became known as "the angel maker on Bruks Street".
 She is widely considered to be one of Sweden's most notorious female serial killers.
Female Serial Killers: How and Why Women Become Monsters is a non-fiction true crime history by Peter Vronsky, a criminal justice historian.
 It surveys the history of female serial killers and female-perpetrated serial homicide, its culture, psychopathology, and its investigation from the Roman Empire to the mid-2000s.
Huang Yong (; November 18, 1974 – December 26, 2003) was a Chinese serial killer accused of murdering 17 teenage boys (although he is suspected of 25 murders) between September 2001-03.
Lyda Southard (also known as Lyda Anna Mae Trueblood) was born on October 16, 1892, and died on February 5, 1958, of a heart attack.
 She is considered one of America's first female serial killers, preceded by Jane Toppan.
 It was suspected that she had killed her four husbands, a brother-in-law, and her daughter by using arsenic poisoning derived from flypaper to poison them in order to attain life insurance money.
Peter Vronsky is a Canadian author, filmmaker and investigative historian.
 He holds a PhD in criminal justice history and espionage in international relations from the University of Toronto.
 He is the author of a bestseller true crime history "" (2004) and "Female Serial Killers: How and Why Women Become Monsters" and the director of several feature films, including "Bad Company" (1980) and "Mondo Moscow" (1992).
 He is the creator of a substantial body of formal video and electronic art works and new media.
 He has also worked professionally in the motion picture and television industry as a producer and cinematographer in the field of documentary production and news broadcasting with CNN, CTV, CBC, RAI and other global television networks in North America and overseas.
 Vronsky's most recent book was published in 2011, "", a controversial new history of Canada's first modern battle - the Battle of Ridgeway fought against Irish American Fenian insurgents who invaded across the border from the United States on the eve of Canadian Confederation shortly after the American Civil War.
 He currently lectures at Ryerson University's History Department in the history of international relations, terrorism, American Civil War, Third Reich, and new military history.
Jane Toppan (1857–1938), born Honora Kelley, was an American serial killer, nicknamed "Jolly Jane".
 After her arrest in 1901, she confessed to 33 murders.
 She is quoted as saying that her ambition was "to have killed more people — helpless people — than any other man or woman who ever lived".
Serial Killers Ink is a website dedicated to selling "murderabilia" (collectibles related to murders, murderers or other violent crimes) and serial killer art, interviewing convicted serial killers and also serves as a meeting place for those interested or involved in the murderabilia industry.
Bertha Gifford (October 1872 – August 20, 1951) was a farmwife in rural Catawissa, Missouri during the early 1900s who was accused of murdering 17 members of the local community.
 Some consider her to be America's third female serial killer, behind Lydia Sherman and Jane Toppan.