5. Susan Atkins and Patricia Krenwinkel
Members of the infamous Manson Family, Susan Atkins and Patricia Krenwinkel teamed up to murder actress Sharon Tate, who was heavily pregnant at the time of her murder. The scene that Atkins and Krenwinkel left in their wake was nothing short of horrendous.
Susan Atkins was seen as the leader, as she stabbed Tate a total of eight times and admitted at her trial that she felt no remorse as she did it. In fact, she stated that Tate called out for mercy but Atkins felt none. While Krenwinkel might have seemed less involved in the act, she was fully engaged. She even used the victim’s blood to write the words “death to the pigs” on the wall of Tate’s home.