Brutal

ブルータル 殺人警察官の告白

by Kei Koga, Ryou Izawa

The manga centers on homicide detective Hiroki Dan, the son of a former police superintendent general, and who seems to be on the fast track to career success. He maintains a hidden identity as a serial killer responsible for more than a hundred murders of people he deems beyond the reach of the law. (Source: Anime News Network)