An angel of mercy is a rare type of serial killer who is usually female and employed as a caretaker. The angel of mercy is often in a position of power and decides the victim would be better off if they no longer suffered. This person then uses their knowledge to manufacture the death of her or his victim. As time goes on, this behavior escalates to encapsulate the healthy and the easily treated. One known serial killer considered to fit this description is Jane Toppan. During her murder trial, she admitted that she was sexually aroused by death. As a nurse, she would administer a drug mixture to patients she chose as her victims, lie in bed with them and hold them close to her body as they died.