In addition, a sample of 45 violent crimes brought before the superior courts in California between the years 1977 and 1979 are profiled to portray the kinds of violence (murder, rape, suicide, and other aggressive and hostile activity) that can result from PCP intoxication. The profiles indicate the kinds of defendants in terms of their drug histories, PCP histories, personalities, and PCP reactions. These data show that all the defendants had multiple drug use histories and were polydrug users at the time of the alleged offense, with most initiating their drug use at around age 17. PCP usage varied among the defendants. Their typical profile shows that they are likely to be assaultive and combative males who attempted to keep their impulsive feelings controlled with drug intoxications. They felt alienated, had a low frustration tolerance, and were relatively unable to defer gratifications. The major legal opinions in these 45 cases are discussed, indicating that, in general, the areas covered were diminished capacity, unconsciousness, and intoxication. The overriding question usually concerned PCP and its effect on criminal responsibility. Overall, the PCP defense claiming diminished criminal responsibility was not as successful as nondrug insanity defenses. Finally, the articles ends with several detailed case studies selected from the 45 California cases. More than 50 references are appended. (Author abstract modified)