This paper proposed a developed graphical user interface (GUI) prototype, whichis supported by the framework of data mining techniques-based criminal judicial reasoning system.The GUI sequences of the prototype are satisfied with criminal judicial procedure in civil lawsystem. Initially, user must build the model by input the existing incident and specifying the detail ofobjects, elements of crime, charge and judgment. After enough training, the prototype will be readyto determine judgments from new occurred incidents. The prototype shows only the results of eachmodule which help in the decision process. This GUI prototype is useful with lawyers, courts orother people who want to determine the guilt, charges and judgments in their incidents.