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[Gun battle + reasoning to solve the case + decisive killing] With his hands stained with blood, Lu Feng, who was originally withdrawn and bloodthirsty, traveled to America and became a policeman. During the day, he investigates and solves cases and fulfills his duties. At night, these suspects will be sent to see God by his own hands. And he discovered that after killing suspects, he could gain their special skills. Gain the shooting skill, gain the boxing skill, gain the anti-reconnaissance skill...