Complex sentence: The agents are armed & Shogo turns off the lights, a shooting occurred & Shogo managed to escapes with the Garland, while Shiji Nakagawa was brutally killed during the pitch black shootout.
Split into simpler sentences: The agents are armed and when Shogo turns off the lights, a shooting occurs. Shogo manages to escape with the Garland, while Shiji Nakagawa is brutally killed in the pitch black shootout.