The purpose of this study is to assess treatment change at both a group and individual level in a sample of 81 Dutch male patients who received mandated care for either violent (non-sexual) behavior or sexual violent behavior. Psychiatric nurses rated patients’ social skills, insight, hostility, physical violence with the BEST-Index every 6 months over the course of 2 years after patients were admitted to hospital. Mixed analysis of covariances and the reliable change index indicated that patients, irrespective of offense type, showed treatment change over time with exception of physical violence. This study shows that general treatment may be useful in the first 18 month for risk factors common to different types of offenses, but that specialized treatment is needed to establish further change.