Chapter 6 Section five

The four surviving people all proved that the murderer was a handsome man with elegant manners and a high nose bridge.Only Yoshida, the acting branch manager, said that the man had a brown scar half an inch wide from the temple to the cheek on the left side of his face, and the other three ignored it; .Acting branch manager Yoshida also said that the man had a provincial badge wrapped around his suit sleeve.About that person’s shoes, only Yoshida, the acting branch manager, mentioned in his testimony. He said that they were the kind of ocher-red rubber boots sold at the stall. what kind of shoes.The staff member Tanaka also said that he couldn't remember the shoes clearly.

The testimonies of the four surviving people were somewhat mixed about the taste, color and smell of the medicine.Acting branch manager Yoshida said: "The first thing I drank was a cloudy liquid, which was a little whitish, like drinking strong whiskey or something. "The clerk Ajiuzawa said: "It is light yellow, smells a bit like ammonia, and tastes bitter." Those who survived were taken to nearby St. Mary's Hospital. Sixteen cups of the poison that the murderer gave the staff as prophylactics corresponded to the number of staff.But there is another one that the murderer used to drink to show them. There should be seventeen in total, but one is short.That is to say, the cup used by the murderer with the armband was not found, presumably he took it away because he was afraid of being fingerprinted.Later, I poured all the remaining liquid in the cup into a small glass bottle of soy sauce, which was very small.The vomit from the dead man was also collected in eight cups, and sent to the laboratory of the Forensic Division of the Metropolitan Police Department the next day (27th).

According to the victims, they were first given a strong stimulant drug, and the second time they were given the same drink as water.If you drank the cyanate compound, it was probably the one you drank first.In this way, the rest of the drink is mainly the second liquid.Upon investigation, there was no trace of cyanic acid or other similar poisons. Therefore, further precise assays are required.So the investigative authorities commissioned Professor Kimura from the Chemistry Laboratory of the University of Tokyo's Faculty of Science to conduct a spectroscopic analysis of the stomach contents.Assistant Yuanhua made a formal analysis.There were cups containing the vomit of the dead, bottles of soy sauce containing the remaining liquid, and two brown bottles containing the vomit of the survivors who survived gastric lavage.Assistant Yuanhua also detected a small amount of cyanic acid from the two bottles of liquid.When Xishan technician opened one of the bottles, he smelled carbolic acid in addition to the smell of cyanic acid.Later, when I went to St. Mary's Hospital to investigate, I found out that it was caused by the use of empty bottles of carbolic acid.According to the examination, only potassium and sodium were found in the contents of the stomach and the liquid left after drinking.On the basis of the results of this assay, the investigating authorities may presume that the poison used was potassium cyanide when deciding on the investigation.But for the sake of caution, Xishan technician said in the report: the first medicine is similar to potassium cyanide, and the second axis seems to be water.

The contents of the stomach apparently contained cyanic acid, so the poison drank was undoubtedly cyanic acid.The problem was that it was a compound of cyanic acid and something.Therefore, various reaction tests were carried out on the liquid obtained by filtering the contents of the stomach, but only potassium and sodium were detected.It was concluded that it must be potassium cyanide or sodium cyanide. Poison is the only murder weapon in this case, so I wrote down the process of testing poison in such detail.