Daisuke Mori

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Daisuke Mori (守 大助?, Mori Daisuke, born April 28, 1971) is a Japanese nurse, who was convicted for giving lethal doses of the muscle relaxant drug Vecuronium to his patients in a clinic in Izumi-ku, Sendai, Miyagi Prefecture. He was suspected as a medical serial killer, though he was convicted of one murder.

Mori was suspected of a murder of 89-year-old woman Yukiko Shimoyama on November 24, 2000. He was also suspected of four attempted murders; a 1-year-old girl on 2 February 2000, an 11-year-old girl on 31 October 2000, a four-year-old boy on 13 November 2000 and a 45-year-old man on 24 November 2000. He was arrested on January 6, 2001.[1]

When he was arrested, he was reported to have murdered at least 10 people.[2][3] However, he insisted on his innocence four days after his arrest.[4] He may have protected his girlfriend.[5] There were also many problems and mysterious deaths in his hospital, so his lawyers insisted that he was accused as their substitute.[6] The U.S. newsmagazine Time criticised Japanese hospitals as well as him.[7]

The district court in Sendai sentenced him to life imprisonment on March 30, 2004 for one murder and four attempted murders.[8] Japanese police insisted that Vecuronium's molecular mass is 258, but its true molecular mass is 557. His defense pointed out this contradiction on the high court, but the high court in Sendai upheld the original sentence on March 22, 2006. He appealed to Supreme Court, which upheld the sentence on February 25, 2008.[9]



  1. ^ "Sendai's killer nurse". Japan Today. 2001-01-26. Retrieved 2008-03-22. [permanent dead link]
  2. ^ Richard Lloyd Parry (2001-01-11). "My girlfriend left me so I murdered 10 patients, confesses Japanese". Independent Newspapers. Retrieved 2008-01-06. [dead link]
  3. ^ "Japanese nurse kills 10 patients, says wanted to trouble hospital". The Indian Express. 2001-01-10. Archived from the original on 2012-03-09. Retrieved 2008-03-22. 
  4. ^ "Nurse gets life for muscle-relaxant slaying". The Japan Times. 2004-03-31. Retrieved 2008-03-22. 
  5. ^ ""Lethal" nurse's girl stands by her man". Japan Today. 2001-04-30. Retrieved 2008-04-08. [permanent dead link]
  6. ^ Keiji Hirano (2006-11-16). "Courts ignore reasonable doubt: lawyers". The Japan Times. Retrieved 2008-02-04. 
  7. ^ Tim Larimer (2001-01-22). "Very Questionable Care". Time. Retrieved 2008-02-04. 
  8. ^ "Nurse gets life for patient slaying". The Japan Times WEEKLY. 2004-04-10. Retrieved 2008-03-22. 
  9. ^ Mainichi Shimbun (2008-03-12). "Top court dismisses nurse's protest over life sentence for murdering patient". HDR Japan. Archived from the original on 2011-07-11. Retrieved 2008-03-21. 

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