Dossier concerning Cheng Yongmei (成永美), a 28-year-old man, whose death in Shanghai in July 1944 was investigated as suicide by poisoning. The police documentation identifies the substance as 砒霜 (arsenic) and treats the case as deliberate ingestion with suicidal intent. The death report records that Cheng died on 28 July 1944 at the Chinese Red Cross Hospital on Huashan Road (華山路中國紅十字會醫院).

The dossier contains the police report on the non-natural death, a narrative investigation of the circumstances surrounding the poisoning, witness interrogation, correspondence requesting judicial examination, and a detailed medico-legal examination of the corpse. The subsequent forensic examination records no significant external traumatic injuries relevant to the cause of death. The final medico-legal conclusion states 委係服毒身死—that the deceased died as a result of ingesting poison.