Abstract
The article is dedicated to one of the methods of further law-making – concretization or fulfilling with content of general principles of law. There are described the theoretical aspects of this legal method and investigated it’s practical manifestation in the judicial decisions in criminal law in Latvia. In the legal system of the democratic rule of law based state general principles of law are legal norms with the highest judicial power and the content of these principles can be defined only with concretization, therefore legality of this method is undoubted. This method is applicable regardless of whether it improves or worsens offender’s status.