Guodong started collecting evidence with a sad mood, and Xuexin also looked at Yi Fei's body one by one. Guodong initially judged that Yi Fei died in another place and was later moved here. Xuexin came to the conclusion after an autopsy of Yifei's body that the circumstances of her mother's murder were the same. Yifei also had her face cut open and then stabbed multiple times to death; Xuexin believed that the assailant was a dangerous person with a psychopath.