"Clue?" Bai Qingliu raised his voice, and the declarative sentence turned into a question.
"What do you know about serial murder cases? You must tell the police everything you know." Ouyang Liao explained impatiently.
"Comrade police officer, I came here after seeing the reward list posted outside. In fact, I really don't know any clues about that case. I just want the reward of 10,000 yuan." At this point, Bai Qingliu finally looked away from Ouyang Liao. He lowered his head and scratched his hair with his right hand, looking a little nervous.