Guodong concluded that Bonnie was not the murderer of Paul, because the circumstances at the scene confirmed that Bonnie was killed earlier than Paul. When Xuexin examined Bonnie's body, he found a piece of black cloth hooked on her watch. When everyone was meeting to discuss the case, Zhengmin pointed out that there was a leather brand in the suitcase where the body was hidden, with a number printed on it. Xuexin recognized that the number was only found in a certain brand of ...