Dys Cascade

A bucket filled with 12 litres of blood and a human arm has been found left in the police station parking lot. A veteran detective and his female cop buddy track down a one-armed man, who keeps trying to pick a fight with the police. As the investigation progresses, the mystery deepens, and its connections to past incidents keep coming to surface. The root of this case runs deep! (Source: Kodansha, translated)