suspicionThis book explains how the accuracy and diagnostic accuracy of key evidence, such as confessions collected and assessed in criminal proceedings, victim statements, eyewitness identification, CCTV video evidence, fingerprints, DNA evidence, The process of breaking the due process is shown in detail based on specific cases and empirical psychological studies. In addition, when the limitations and abilities of human psychology known by extensive psychological studies are taken as a given condition, the accuracy of the evidence should be maximized in the investigation stage of the criminal procedure, and it should be improved to maximize the diagnosis in the stage of trial And suggests institutional improvements. Although the American criminal system and procedures are very different from those of the Republic of Korea, the question of the accuracy and diagnostic quality of evidence, as the method of scientific research on humans, regardless of culture, history, or race, Regardless of the difference between the two. In this regard, institutional remedies proposed by professor Dan Simon have great implications and importance for the criminal proceedings of the Republic of Korea.