Jane Toppan

Jane confessed to thirty-one murders in 1901, but is believed 
to be responsible for at least twice that many. She is quoted 
as saying that her ambition was to have killed more helpless 
people than any other man or woman who ever lived. 


http://www.mayhem.net/Crime/serial1.html

http://www.websurfer13.com/Absinthejane_toppan.htm