Major affective disorders and forensic psychiatry

Area of Science:

• Forensic Psychiatry
• Psychopathology
• Criminal Law

Background:

• Major mental illnesses are a small diagnostic group within mentally disordered offenders.
• Major affective disorders are less prevalent than schizophrenias in this population.
• Despite lower prevalence, major affective disorders are linked to severe violent offenses.

Purpose of the Study:

• To examine the role of major affective disorders in violent crimes committed by mentally disordered offenders.
• To understand the criminal responsibility and legal outcomes for individuals with major affective disorders who commit offenses.

Main Methods:

• Analysis of diagnostic groups among mentally disordered offenders.
• Review of crime types associated with major affective disorders.
• Examination of legal responsibility and outcomes (e.g., not guilty by reason of insanity).

Main Results:

• Major affective disorders constitute a small fraction of mentally disordered offenders compared to schizophrenias.
• Patients with major affective disorders commit a disproportionate number of severe violent crimes, including murder, attempted murder, and serious assaults, particularly intrafamilial violence.
• Offenses are typically committed during active phases of the illness, leading to a majority being deemed not fully criminally responsible.
• A significant number of these offenders are found not guilty by reason of insanity and are committed to psychiatric hospitals.

Conclusions:

• Major affective disorders, while less common than schizophrenia in offender populations, are associated with high rates of severe violence.
• The active symptoms of major affective disorders frequently impair criminal responsibility, leading to legal findings of not guilty by reason of insanity.