Poggiali Daniela
Daniela Poggiali is an Italian nurse who has been accused of killing 38 of her patients. She took photos of herself with some of the victims' bodies.
She was arrested after an autopsy on 78-year-old Rosa Calderoni revealed dangerous levels of potassium in her body. 38 of 86 of her patients died within a three month period. She reportedly killed her patients because they were annoying.