27. Idoia Lopez Riano
Idoia Lopez Riano is known as “The Sexual Tigress” because of her fearsome reputation. She has assassinated more than 20 people throughout the 1980s and would seduce police officers with her sexual prowess.
She was arrested in 2003 and sentenced to 1,500 years in prison for her countless killings. While in prison, she showed remorse for her killings and was later released. According to her mother, she is currently in Barcelona working for the Red Cross.