Is Return of the Bloodthirsty Police Worth Reading? Review & Where to Read

Quick facts
Format	Manhwa (seinen), 142 chapters
Run	ongoing
Community score	MangaUpdates 6.8
Content	Violence, blood and gore, child abuse, drug trafficking, cult themes

Overview

Bi-Gwang was raised from childhood by Bo-Sal, a monk who ran the Hwaguksa temple as cover for an elite hitman organization. When Bi-Gwang finally grows tired of killing and tries to walk away for a normal life, Bo-Sal and the rest of Hwaguksa betray and murder him for it. He doesn't stay dead - his soul lands in the body of police officer Kim Gyeong-Su, and he sets out to use his new badge to take Hwaguksa apart from the inside.

Written by Lee Je-Hwan with art by Lee Yoon-Kyoon, the series runs on Naver Webtoon in Korea under the domestic title Killer Cop, with a large international following through official translations in French, Thai, Indonesian, Japanese, and Chinese - though no official English release yet.

What it does well

The premise gives Bi-Gwang a clean, ruthless throughline: infiltrate the police, climb fast, and use the badge as a weapon against the organization that killed him. Because he's a trained killer occupying a cop's identity rather than a rookie discovering violence for the first time, the story skips the usual slow-build power fantasy and gets straight to competent, brutal action.

The cult-and-crime backdrop gives the revenge plot real texture - Hwaguksa isn't a cartoonish evil organization, it's dressed as a religious institution with its own internal politics, which lets the story dig into corruption, manipulation, and the specific cruelty of being raised as a weapon by people posing as caretakers.

The tragic-past structure also earns its weight. Bi-Gwang's history as a child assassin and his betrayal aren't just backstory dressing - they inform how coldly he operates in the present, and the flashbacks are used to explain his methods rather than to pad the runtime.

Where it falls short

This is a genuinely dark, violent series - blood and gore, drug trafficking, child abuse, and cult manipulation are all part of the material - and it doesn't soften any of that for pacing's sake. Readers looking for something lighter should know what they're getting into.

The fights lean into stylized, unrealistic action rather than grounded combat, which some readers will love and others will find at odds with the otherwise grim, procedural tone of the corrupt-cop plotline running alongside it.

With no official English release yet, readers currently have to go through a non-English official version or wait for a licensed translation, which is a real barrier for English-only readers wanting to support the series properly.

Verdict

Killer Cop (Return of the Bloodthirsty Police) pairs a ruthless assassin-turned-cop revenge plot with a genuinely unsettling cult backdrop, and it commits fully to the darkness of its premise instead of pulling punches. It's not for readers wanting something gentler, and the lack of an English release is a real hurdle right now, but the setup and execution make it worth watching for a future translation.