There are many new applications in forensic psychiatry/psychology. By understanding the idiosyncrasies and behaviors of various personalities society can be forewarned as to the potentially troublesome behavior. Stalking behavior encompasses an individual's thoughts, feelings and behaviors that can result in a pattern of repeated, unwanted intrusions or communications with another person. Extreme mutilation, especially that which is centered around the genitalia is typically considered to be a sadistic homicide by the police. However, the medical examiner may draw a different conclusion. In the case of capital punishment, the criminal justice system has determined that for the person to be executed they must not only understand the impending execution but must also know the reason for it.