Case study of wrong determination of a death by hanging

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  • 縊死偽装事例における誤認検視に関する事例研究
  • 縊死偽装事例における誤認検視に関する事例研究 : 司法警察員と検視官の遺体情報の記述特徴
  • イシ ギソウ ジレイ ニ オケル ゴニン ケンシ ニ カンスル ジレイ ケンキュウ : シホウ ケイサツイン ト ケンシカン ノ イタイ ジョウホウ ノ キジュツ トクチョウ
  • 司法警察員と検視官の遺体情報の記述特徴
  • Disparity in the description of the corpse by a police officer and a coroner

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Abstract

Information associated with suicide can cause confirmation bias among police officers, misleading them to make wrong determinations. In general, police officers are more likely to have a confirmation bias compared with coroners. This case study aimed to gain insight into the psychological phenomenon of confirmation bias in a death case by false-hanging. Employing the text mining approach, we analyzed the words describing the corpse from information in the published inquest records of the police officer, coroner, and forensic doctor. The result of a chi-square test and residual analysis showed that there was less corpse information in the re- cords of the police officer, who made a wrong determination, than the coroner and the forensic doctor. Fur- thermore, the police officer focused on information related to the instrument used for hanging (cord), neck pressure, and body weight more than the coroner and the forensic doctor.

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