The Necessity of Forming File in Juveniles Delinquent Trial in Iranian and American law

The Purpose of this study is to investigate the need to form a personality file on juvenile delinquents in the implementation of the principle of individualization of punishment by considering the different dimensions of this case (biologically, psychologically and socially) in the legal system of Iran and United States with emphasis on California. The method used is descriptive-correlation method. The statistical population is one hundred judges and lawyers, sociologists and social workers, psychologists and psychiatrists and also Master and PhD students in law. The data collection tool is a researcher-made questionnaire. The results of this study indicate that identifying the personality of juvenile delinquents has a significant effect on the individualization of punishment, recognizing the causes of crime and socialization of the offender after serving the sentence. Therefore, forming a personality file with a criminal case is necessary and inevitable.in the criminal policy of countries.