The authors studied all such patients at one of North Carolina's four state mental hospitals during the first year of the new law's operation, and found that there were only 16 of them. These patients were compared to a control sample of civilly committed patients without criminal charges; it was found that the forensic patients spent longer in the hospital than the controls, but still significantly less time than reported in studies from other states. The authors discuss possible reasons for these differences and comment on the effectiveness of such legislation. (Author abstract)