A Preliminary Report of Psychiatric Diagnoses in a Scottish County Sample of Persons of National Security Concern

Increasing anecdotal, empirical, and research evidence indicates mental disorder history is one of the several factors associated with increased risk of involvement in lone-actor terrorist activities. Currently, few studies have been conducted on the mental disorder histories of individuals assessed as at risk of involvement in terrorist activities (Meloy, J Threat Assess Manag 2019;6:93). This pilot study describes demographic, psychiatric, and criminal characteristics of a sample of Scottish individuals identified by the Prevent element of the U.K. national counterterrorism strategy, and outcome data after follow-up at 2 years. Twenty-three individuals were referred to Prevent as posing a national security risk from a county in Scotland. Their records were studied for psychiatric and criminal histories. Nine (39%) had previous psychiatric contact, all were "lone actors", and none were embedded with organized terrorist groups. The most common diagnoses were substance use disorder, personality disorder, depression, and psychotic disorder. The sample displayed factors associated with increased risk of violence including previous offending, early behavioral difficulties, school problems, substance misuse, cluster B personality disordered traits. After 2 years, 44% of the mentally disordered group had re-offended. The offense types were generally similar to those prior to the individual being involved with the Prevent counter terrorism program. Only one of the mentally disordered group committed a further national security offense. In this sample, mental disorder history is overrepresented in individuals who come to the attention of the U.K. Prevent counter terrorism strategy. Further empirical studies with additional power are required to develop the empirical evidence base in this under-researched area.