Cao Jiaoer is the third victim of the serial murders, a 46‑year‑old divorced woman who lived alone. Her corpse was found with typical signs: hands tied behind back, mouth stuffed, and countless needle punctures all over the body. Her soul remained in her apartment after death and was summoned by Chen Cheng using incense and yellow paper during a night ritual. She provided information that allowed Chen Cheng to deduce clues about the murderer. Her name was given by Zhang Qian during the scene investigation.
