RT Journal Article SR Electronic T1 Shared Psychotic Disorder and Criminal Responsibility: A Review and Case Report of Folie à Trois JF Journal of the American Academy of Psychiatry and the Law Online JO J Am Acad Psychiatry Law FD American Academy of Psychiatry and the Law SP 511 OP 517 VO 34 IS 4 A1 Kaustubh G. Joshi A1 Richard L. Frierson A1 Tracy D. Gunter YR 2006 UL http://jaapl.org/content/34/4/511.abstract AB We present a case of shared psychotic disorder involving three sisters who were successful in establishing an insanity defense on numerous felony charges in the South Carolina criminal court system. Two of the authors of this article were court-appointed examiners in this case. We then present a history of shared psychotic disorder, an overview of the use of this diagnosis in the defense of insanity, and a discussion of the disposition of individuals with “temporary insanity.” Finally, we compare shared psychotic disorder, culturally based belief systems, and religious cults, with a focus on their common and contrasting characteristics.