Mad but still sane

You're a police officer working on the case of a serial killer that rips the kidneys out of each one of his victims. But everything ever found on the crime scene is the victim's body and a puddle of blood. But one day you get a mysterious call from a little girl, crying for help. As you arrive at the crime scene you see the serial killer with your own eyes. But do you survive? What happens to you and what happens to him? Find out in 'Mad but still sane'
(Eyeless Jack x reader)