We went outside and saw Cheng Yahui lying on the ground. He was crouched in a fetal position and was still conscious, but he was writhing and groaning in pain.

Xiaotao kicked him and said, “Get up! You’re trying to frame the police, aren’t you?”

“Wait,” I stopped her. “It looks like he’s been poisoned!”

I pulled up his eyelids and checked his pupils. They were contracted, and his eyes were bloodshot—these were clear signs of poisoning. But who could poison him? He’d been in police custody since morning!

I told Dali to quickly get some soapy water to induce Cheng Yahui to vomit. Suddenly, Cheng Yahui clutched at my wrist and with much effort told me, “My medicine… I left it in the interrogation room…”

Xiaotao ordered an officer to check the interrogation room immediately. He then returned a few minutes later with a bottle of medicine under the desk. It was labelled as tranquilizer. No one dared to give Cheng Yahui the medicine....