"The perpetrator might have drugged the victim before binding her hands and feet. However, the perpetrator did not kill the victim immediately but waited for a period of time before carrying out the murder. This explains why the black hooded sweatshirt suspect captured on surveillance entered Yintan Huayuan Community at 12:30 but left the crime scene around 3:30 AM. The three hours in between is likely when the victim was not murdered, which is also why you cannot detect any signs of drugging on the victim.",Then, after a short while, Jiang Yùn Bái saw the freshly taken X-ray images of Gu Yàn on the computer.,Gu Yan turned his head to glance at the deserted doorway.。