There are many types of slow-acting poisons that can be used to control the time of a person's death. Anticipate the time of death, continue to poison over time. At the moment of action, make them ingest food that can stimulate toxicity, or suddenly increase the dose. Thus, they probably wouldn't live to see another day.
Xiang Rong died suddenly with a few faint glimmers of hope left for the police, along with a pile of unsolved mysteries. He didn't even create a portrait of "Brother Yu". That is to say, all suspicion and identification of Leng Yu have fallen through. Whether he was poisoned or took the poison himself to protect the organization he was a part of, no one knows.
You Mingxu, Xu Mengshan, and Yin Feng stood in the interrogation room, looking at Leng Yu, who was pale and sweating, but didn't have any visible injuries. Yin Feng was right, he didn't file a lawsuit or refuse to let go, he swallowed the loss.
