Have the protagonists ever killed innocent people? Little brother Wu Xie, blind, floret, fat?

The first movie killed Dakui, who was innocent and his uncle did it. Later they didn't describe the adventure in detail, but they must have been killed. Xiaohua, who supports a family by himself, must be full of blood. The fat man's early experience became a mystery, and he was probably killed. Innocent later, he must have been killed on the way to Little Brother for ten years. Finally, who is innocent?