Description:

Homicide detective Dan Hiroki, son of the former Superintendent General of Police, seems to be on the fast track to career success. But...he also maintains a secret identity as a serial killer responsible for the murders of more than a hundred people whom he had deemed beyond the reach of the Law. (Source: MangaUpdates)

Alternative Titles:

惨绝制裁：杀人警察官的告白, Brutal: Satsujin Kansatsukan no Kokuhaku