Female unsubs are rare to come by in Criminal Minds. While they are often painted as sympathetic figures, their crimes are just as horrifying as their male counterparts. Some are even worse. From masterminds who target the FBI's Behavioral Analysis Unit to sadistic, tortuous killers, female unsubs can be brutal.

Female unsubs are responsible for some of the worst kills in Criminal Minds. Female killers on the show are arguably better at carrying out their schemes. With their attention to detail and less impulse-driven motives, they are less likely to snap or make mistakes. The worst ones have incredibly shocking crimes.

Sera Morrison Frames Her Father in "All That Remains"

Sera is only a teenager, but she almost manages to fool the Bau. This Criminal Minds episode is hard to rewatch. Sera stages things to frame her father, who suffers from dissociative personality disorder, for the deaths of her mother and younger sister.