During the growth and development of children, the government and society must play an important role in providing attention and concern for the growth of children, social and cultural influences as preventive measures in preventing children from behavior that violates norms are very much needed because in their growth and development, children are not only victims of criminal acts but children can also become perpetrators of criminal acts such as the example of a case of ganging up that caused death where the perpetrator was a minor. In this study, the formulation of the problem is the basis for the judge's consideration in deciding and applying criminal sanctions for children who are perpetrators of ganging up that caused death and legal protection for children as perpetrators of ganging up that caused death. The method used in this study uses the type of empirical legal research, data sources are primary data and secondary data, with a case approach and a fact approach, data collection techniques are interviews and literature studies, qualitative descriptive data analysis techniques. In the discussion, the author uses the theory of judge considerations, the theory of punishment, the theory of legal protection and the principle of the best interests of children. the result of which is The basis for judges' considerations in deciding criminal sanctions for children who commit crimes of assault resulting in death is based on three factors: legal factors (evidence and elements of the crime), philosophical (justice for victims and the rights of child perpetrators), and sociological (social and psychological research of children). Legal protection for child perpetrators of crimes includes preventive and repressive efforts. fulfillment of children's rights during the trial process, in accordance with the principle of the best interests of the child.