9 most evil female serial killers – Their evil deeds will leave you speechless (With Pics)

6. JANE TOPPAN
A.K.A. – JOLLY JANE

In 1931, Jane Toppan confessed to 31 murders and she was found not guilty by reason of insanity. A sadistic nurse who manipulated hospital reports, she took to experimenting with morphine and atropine… on her patients. After administering a lethal dose of drugs, she would sit with and hold her patients until they died. The killer angel claimed her goal was “to have killed more people – helpless people – than any other man or woman who ever lived.”