About the influence that presence of a crime experience gives to testimony communication

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We compared testimony of an innocent person without a crime experience with that of the true criminal about the same case. We aimed to clarify differences of testimony contents and change process of testimony. At first we investigated a trend of a study in the field of psychology to relate to the confession, as preparations work of the next study. As a result of investigation, various analysis techniques of the confession were clarified systematically. In next study, we picked trial cases, in which the accused who had confessed crimes at an investigation became innocence later from other evidences. We analyzed a judgment to be concerned with trust characteristics evaluation of confession. There are important points for judgments : progress of confession, change of confession, rationality of confession, and agreement of confession with objective evidences. Furthermore, we extracted an innocent example, where there are confession of an innocent person and confession of the true criminal in the same case. The case was the Uwajima case that the true criminal appeared at the time of trial, and it became clear that the accused was innocent. Therefore we analyzed a written statement in an investigation stage of Uwajima case. As a result, between testimony of the true criminal and an innocent person, qualitative difference was seen in contents of statements about a crime. For example, a statement about core point of a case was consistent and detailed in testimony of the true criminal. In contrast with this, a statement consistency and details were seen in a circumferential matter in a crime act by testimony of an innocent person. On the basis of such an analysis result, we considered a testimony generation process of a suspect/the accused and an investigation official and clarified the influence that presence of a crime experience gave to testimony communication.