When Brother Zhang spoke, he was extremely arrogant, completely shedding his previous timidity. It was clear that he had recovered from the surprise and, after realizing what was happening, was now confident and fearless.
He understood that police investigations revolve around evidence, and arresting someone also requires evidence; otherwise, they cannot arrest someone without cause. When they entered just now, he wasn't holding a knife nor was he involved in the fight, so he was utterly unafraid.
At most, they could say he had a wound on his head from participating in a fight, but they absolutely could not pin the charges of entering a house to molest a girl or to commit violence on him, as said by the lead officer.
