The sarin attack at Tokyo subway was just a few years before this arsenic murder case.
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Influence on the academic researches of Wakayama arsenic murder case Since 2012, Kawai, the author of the present paper, found many faults in the forensic analyses in this case, of which documents were submitted to the court from the prosecutor, and again this murder case becomes discussed in Japan.Ģ. The forensic analysis of SPring-8 was just 1 year after it became in use. It was well known to the public at that time that SPring-8, one of the third generation synchrotron radiation facility, a 1.5 km circumference accelerator ring of 8 GeV, was used for the forensic analysis.
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Marianna University School of Medicine, Osaka Electro-Communication University, and Hiroshima University. The forensic analyses were performed mainly by the National Research Institute of Police Science, Tokyo University of Science, St. Infrared (IR), ion chromatography/inductively-coupled plasma mass spectrometry (IC/ICP-MS), X-ray diffraction (XRD), scanning electron microscope-energy dispersive X-ray analysis (SEM–EDX), and many other chemical analysis techniques were used.īecause the chemical poison was used by the Tokyo subway sarin attack in 1995, the Wakayama arsenic case attracted large attention by mass media, such as television, newspapers, and gossip magazines, at that time for about 1 year duration. Several impurity elements in the arsenic oxide powders were analyzed by the SR-XRF and inductively-coupled plasma atomic emission spectrometry (ICP-AES), as was reviewed by Kawai. The hair was analyzed by synchrotron radiation X-ray fluorescence (SR-XRF) and also by atomic absorption spectrometry (AAS). These two evidences are the main reasons of her death penalty. “High concentration arsenic” was found on one of her hairs, which was one of the several hundreds of hairs cut on December 9, 1998, by the police. Therefore the key forensic analysis was the identification of arsenic oxide powders between her husband’s and the powder adsorbed on the inner surface of the paper cup. Her husband had arsenic oxide powders as white ant pesticide, as his job was white ant exterminator. Powder of about 35 mg arsenic oxide, As 2O 3, was left inside of the paper cup. This paper cup might have been used to poison the curry pot bringing arsenic. The only evidence was a paper cup found near the cooking site. She has denied from the first until now, but she is now in the death row. Finally, May 18, 2009, the death penalty has been fixed at the Supreme Court of Japan. Then again she was sentenced to death at Osaka Court of Appeal.
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She was sentenced to death on December 11, 2001, at the Local Court of Wakayama. H, was arrested on October 4 and prosecuted as the murder on December 29. During the noon and 3 pm, the curry pots were kept boiling by housewives of the organizers in turn. The curry was cooked from noon till 3 pm there, and then moved to the festival venue. The curry was cooked in two pots in a garage of a festival organizer’s house. Although the outline was reported by Kimura, a brief chronologically ordered outline should be described here. Wakayama is a city near the Osaka Kansai International Airport. One of the two curry pots was poisoned during the cooking for the preparation of the festival in a small town in Wakayama city. The arsenic intake was authorized by the arsenic analysis of urine.
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It is still not well known whether some embryos or fetuses were included within 63 or not, because the personal data is not open. Outline of the Wakayama arsenic murder caseįour people were killed by arsenic poisoned curry at a summer festival on July 25, 1998, and other 63 participants were heavily injured but survived though they ate the poisoned curry.