“Should we investigate the pregnant woman’s identity?” I asked Xiaotao.

Bingxin and Dali were puzzled. They hadn’t heard of the information that Lao Yao had found, so I explained it to them briefly.

“I don’t think it’s necessary at this point,” said Xiaotao. “It doesn’t matter who got pregnant. What matters is who killed those women! The suspect will arrive soon. Let’s go wait for him in the interrogation room.”

Xiaotao and I went into the interrogation room while Bingxin and Dali watched from the one-way mirror outside. It didn’t take long until we heard a loud noise approaching us. It was Cheng Yahui’s voice coming from the hallway.

“You are infringing upon my rights!” he was yelling. “I want my lawyer!”

He was in handcuffs and his hair was disheveled when the police dragged him into the interrogation room. He was shoved onto a chair across the desk. Xiaotao shined the light at his face and said, “I told...