MADDER Sono Jiken, Watashi ga Hannin desu EP09 “I Am the Culprit”

A woman claiming to be a murderer visits Kajiya, a detective in the Investigation Division. Kajiya is pursuing the serial killer who has shaken the whole country. She tells the woman that she doesn’t have time for pranks, but the woman offers her a notebook and says, “There won’t be any more victims. Kajiya reads the notebook and recounts the serial murders that took place at Seiran Academy six years ago. The woman reveals there was a student fascinated by Kurokawa, the suspect, who began committing petty crimes at the academy and eventually became a serial killer.