The subjects of the special research are the 128 repeat homicide offenders (males only) who were being imprisoned with the treatment indicator of LB (referring to those with sentence terms of eight years or more and with advanced criminal tendencies) or B (referring to those with advanced criminal tendencies), as of May 1, 2007. Fig.7-4-1-1 shows the number of persons by case type.

Fig. 7-4-1-1  Number of repeat homicide offenders of by case type