"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.",But Gu Yan showed no intention of getting up and leaving at all.,The little nurse is wearing a mask but she should be smiling.。