Keck School Faculty

Gregory Leong, MD
Gregory Leong, MD
Clinical Professor Psychiatry & The Behavioral Sciences (Part-Time)
Psychiatry and The Behavioral Sciences
2250 Alcazar Street Health Sciences Campus Los Angeles
Gregory Leong, M.D. served as a faculty member of the Department of Psychiatry and Behavioral Sciences at the University of Southern California from 1982 to 1986 before returning to the Department in 2012. During the intervening years, he has been on the medical school faculties at the University of California, Los Angeles, University of Missouri, Ohio State University, and University of Washington. While at the University of Washington Dr. Leong was the Director of the Forensic Psychiatry Fellowship from 2008 to 2011.

Dr. Leong's academic interests have primarily revolved around forensic psychiatry. While at the University of California, Los Angeles, he participated in research projects involving schizophrenia, posttraumatic stress disorder, and smoking cessation.
On the national level, Dr. Leong has served on the Executive Council of the American Academy of Psychiatry and the Law from 1997 to 2000, the Council of Psychiatry and Law of the American Psychiatric Association from 2002 to 2007, and the Committee on Recertification in Forensic Psychiatry of the American Board of Psychiatry and Neurology from 2000 to 2003.

Besides authoring or co-authoring numerous scholarly publications in the professional literature, Dr. Leong served as an associate editor of the Newsletter of the American Academy of Psychiatry and the Law from 1992 to 1999 and an associate editor of the Journal of the American Academy of Psychiatry and the Law from 2004 to 2009. Dr. Leong has been on the editorial board of the Journal of Forensic Sciences since 1997.

Insane Arsonists: An Early 21st Century Sample J Forensic Sci. 2019 Mar; 64(2):454-459. . View in PubMed

Preleukemia: one name, many meanings Leukemia. 2017 03; 31(3):534-542. . View in PubMed

Informed Consent at Gunpoint: When Psychiatry Affects Gun Ownership Behav Sci Law. 2015 Jun; 33(2-3):346-55. . View in PubMed

Determining a Criminal Defendant's Competency to Proceed With an Extradition Hearing J Am Acad Psychiatry Law. 2015 Jun; 43(2):201-9. . View in PubMed

No duty to warn in California: now solely and unambiguously a duty to protect J Am Acad Psychiatry Law. 2014; 42(4):533. . View in PubMed

No duty to warn in California: now unambiguously solely a duty to protect J Am Acad Psychiatry Law. 2014; 42(1):101-8. . View in PubMed

Commentary: Pursuing justice in death penalty trials J Am Acad Psychiatry Law. 2012; 40(1):50-4. . View in PubMed

Psychiatric ethics: foundational and evolutionary J Nerv Ment Dis. 2011 Aug; 199(8):562-6. . View in PubMed

Competence to be executed: An ethical analysis post Panetti Behav Sci Law. 2010 Sep-Oct; 28(5):690-706. . View in PubMed

Revisiting the deific-decree doctrine in Washington state J Am Acad Psychiatry Law. 2008; 36(1):95-104. . View in PubMed

Revisiting the politics of dangerousness J Am Acad Psychiatry Law. 2008; 36(3):278-81. . View in PubMed

Commentary: intoxication and settled insanity--unsettled matters J Am Acad Psychiatry Law. 2007; 35(2):183-7. . View in PubMed

Commentary: restorability of incompetence to stand trial--implications beyond predictive equations J Am Acad Psychiatry Law. 2007; 35(1):44-6. . View in PubMed

Regarding delusional misidentification syndromes Psychiatry (Edgmont). 2006 Dec; 3(12):10. . View in PubMed

Back to the past in California: a temporary retreat to a Tarasoff duty to warn J Am Acad Psychiatry Law. 2006; 34(4):523-8. . View in PubMed

Lycanthropy and delusional misidentification Acta Psychiatr Scand. 2005 Feb; 111(2):162; author reply 162. . View in PubMed

: involuntary treatment case or catalyst for change? J Am Acad Psychiatry Law. 2005; 33(3):292-4.. View in PubMed

Commentary: No rational reasons for changing competency-to-stand-trial standard J Am Acad Psychiatry Law. 2004; 32(3):246-9. . View in PubMed

A neuropsychiatric developmental model of serial homicidal behavior Behav Sci Law. 2004; 22(6):787-99. . View in PubMed

A new classification schema for maternal filicide J Am Acad Psychiatry Law. 2003; 31(1):143-4. . View in PubMed

Neuroleptic-induced akathisia and violence: a review J Forensic Sci. 2003 Jan; 48(1):187-9. . View in PubMed

Delusional misidentification and aggression in Alzheimer's disease J Forensic Sci. 2001 May; 46(3):581-5. . View in PubMed

A classification of psychological factors leading to violent behavior in posttraumatic stress disorder J Forensic Sci. 2001 Mar; 46(2):309-16. . View in PubMed

Potential erosion of psychotherapist-patient privilege beyond California: dangers of "criminalizing" Tarasoff Behav Sci Law. 2001; 19(3):437-49. . View in PubMed

Evaluation of competence to consent to assisted suicide: views of forensic psychiatrists Am J Psychiatry. 2000 Apr; 157(4):595-600. . View in PubMed

Capgras syndrome during the wake and dream state Can J Psychiatry. 2000 Apr; 45(3):299-300. . View in PubMed

A case of partial lycanthropy Can J Psychiatry. 2000 Mar; 45(2):201-2. . View in PubMed

A case of Cotard's syndrome associated with self-starvation J Forensic Sci. 2000 Jan; 45(1):188-90. . View in PubMed

Diminished capacity and insanity in Washington State: the battle shifts to admissibility J Am Acad Psychiatry Law. 2000; 28(1):77-81. . View in PubMed

Revisiting arson from an outpatient forensic perspective J Forensic Sci. 1999 May; 44(3):558-63. . View in PubMed

A test of behavioral family therapy to augment exposure for combat-related posttraumatic stress disorder J Consult Clin Psychol. 1999 Apr; 67(2):243-51. . View in PubMed

A comprehensive typology for the biopsychosociocultural evaluation of child-killing behavior J Forensic Sci. 1998 Nov; 43(6):1112-8. . View in PubMed

Delusion of sexual transformation as delusional misidentification syndrome Can J Psychiatry. 1998 Nov; 43(9):956-7. . View in PubMed

Dangerous misidentification of people due to flashback phenomena in posttraumatic stress disorder J Forensic Sci. 1998 Nov; 43(6):1107-11. . View in PubMed

Delusional physical misidentification in the syndrome of subjective doubles Can J Psychiatry. 1998 Apr; 43(3):308. . View in PubMed

Erotomania in a case of fragile-X syndrome Gen Hosp Psychiatry. 1998 Mar; 20(2):126-7. . View in PubMed

A new variant of "subjective" delusional misidentification associated with aggression J Forensic Sci. 1997 May; 42(3):406-10. . View in PubMed

Disability payments and drug abuse Psychiatr Serv. 1996 Nov; 47(11):1266. . View in PubMed

Dangerous delusional misidentification and homicide J Forensic Sci. 1996 Jul; 41(4):641-4. . View in PubMed

Civil commitment and managed care Psychiatr Serv. 1996 Apr; 47(4):432. . View in PubMed

Employee sabotage in the workplace: a biopsychosocial model J Forensic Sci. 1996 Jan; 41(1):52-5. . View in PubMed

California's diminished capacity defense: evolution and transformation Bull Am Acad Psychiatry Law. 1996; 24(3):347-66. . View in PubMed

Bilateral cerebral pathology and the genesis of delusional misidentification Can J Psychiatry. 1995 Oct; 40(8):498-9. . View in PubMed

Psychiatric-legal analysis of criminal defendants charged with murder: a sample without major mental disorder J Forensic Sci. 1995 Sep; 40(5):858-61. . View in PubMed

Another courtroom assault on the confidentiality of the psychotherapist-patient relationship J Forensic Sci. 1995 Sep; 40(5):862-4. . View in PubMed

Dangerous delusions of misidentification of the self J Forensic Sci. 1995 Jul; 40(4):570-3. . View in PubMed

A case of inanimate doubles syndrome Can J Psychiatry. 1995 Jun; 40(5):277. . View in PubMed

A psychiatric-legal analysis of psychotic criminal defendants charged with murder J Forensic Sci. 1995 May; 40(3):445-8. . View in PubMed

Delusional misidentification of the self associated with nondominant cerebral pathology J Clin Psychiatry. 1995 Apr; 56(4):171. . View in PubMed

Behavioral family therapy for Vietnam combat veterans with posttraumatic stress disorder J Psychother Pract Res. 1995; 4(3):214-23. . View in PubMed

Psychiatric factors associated with dangerous misidentification delusions Bull Am Acad Psychiatry Law. 1995; 23(1):53-61. . View in PubMed

Delusional misidentification of health care professionals Psychiatr Q. 1995; 66(1):51-61. . View in PubMed

A cognitive model of dangerous delusional misidentification syndromes J Forensic Sci. 1994 Nov; 39(6):1455-67. . View in PubMed

Approaches offered for curbing violence in the health-care workplace Tex Med. 1994 Oct; 90(10):7. . View in PubMed

Delusional misidentification syndromes may not fall into clearly delineated categories Compr Psychiatry. 1994 May-Jun; 35(3):244. . View in PubMed

Behavioural family management in schizophreniaOutcome of a clinic-based intervention. Br J Psychiatry. 1994 Apr; 164(4):501-6. . View in PubMed

Co-existence of misidentification, pseudocyesis and erotomanic delusions Can J Psychiatry. 1994 Mar; 39(2):126. . View in PubMed

De Clérambault syndrome (erotomania) in the criminal justice system: another look at this recurring problem J Forensic Sci. 1994 Mar; 39(2):378-85. . View in PubMed

"Tarasoff" defendants: social justice or ethical decay? J Forensic Sci. 1994 Jan; 39(1):86-93.. View in PubMed

Competence to terminate life-sustaining care: ethical and legal considerations Am J Geriatr Psychiatry. 1994; 2(2):95-108. . View in PubMed

Delusional misidentification syndromes and dangerousness Psychopathology. 1994; 27(3-5):215-9. . View in PubMed

Delusions of psychological change of the self Psychopathology. 1994; 27(6):285-90. . View in PubMed

Delusional misidentification and dangerousness: a neurobiologic hypothesis J Forensic Sci. 1993 Jul; 38(4):904-13. . View in PubMed

A case of organic Othello syndrome J Clin Psychiatry. 1993 Jul; 54(7):277. . View in PubMed

Misidentification delusions, facial misrecognition, and right brain injury Can J Psychiatry. 1993 May; 38(4):239-41. . View in PubMed

Frégoli syndrome of the self Can J Psychiatry. 1993 Feb; 38(1):68. . View in PubMed

Psychiatry and the death penalty: the past decade Psychiatr Ann. 1993 Jan; 23(1):41-7. . View in PubMed

Delusions of transformation of the self Psychopathology. 1993; 26(3-4):181-8. . View in PubMed

Evolving misidentification syndromes and facial recognition deficits Can J Psychiatry. 1992 Oct; 37(8):574-6. . View in PubMed

A psychiatric study of persons charged with arson J Forensic Sci. 1992 Sep; 37(5):1319-26. . View in PubMed

Dangerousness of the delusional misidentification of children J Forensic Sci. 1992 May; 37(3):830-8. . View in PubMed

A case of Capgras-Fregoli syndrome J Clin Psychiatry. 1992 Feb; 53(2):67-8. . View in PubMed

Misidentification syndrome, facial misrecognition, and dysmorphic symptoms Psychosomatics. 1992; 33(4):471-2. . View in PubMed

Legal and ethical issues in electroconvulsive therapy Psychiatr Clin North Am. 1991 Dec; 14(4):1007-20. . View in PubMed

Misidentified political figures: an underappreciated danger J Forensic Sci. 1991 Jul; 36(4):1170-8. . View in PubMed

A case of "subjective" Frégoli syndrome J Psychiatry Neurosci. 1991 Jul; 16(2):103-5. . View in PubMed

Posttraumatic stress disorder in burn patients South Med J. 1991 Apr; 84(4):530-1. . View in PubMed

Delusion of fetal duplication in a Capgras patient Can J Psychiatry. 1991 Feb; 36(1):46-7. . View in PubMed

Misidentification syndrome and male pseudocyesis Psychosomatics. 1991; 32(2):228-30. . View in PubMed

Opinions by AAPL forensic psychiatrists on controversial ethical guidelines: a survey Bull Am Acad Psychiatry Law. 1991; 19(3):237-48. . View in PubMed

Dangerous mentally disordered criminals: unresolvable societal fear? J Forensic Sci. 1991 Jan; 36(1):210-8.. View in PubMed

Patient psychopathology and expressed emotion in schizophrenia Br J Psychiatry. 1990 Dec; 157:877-80. . View in PubMed

Psychiatric patients and AIDS: the forensic clinician perspective J Forensic Sci. 1990 May; 35(3):644-52. . View in PubMed

An unusual case of Capgras syndrome: the psychiatric ward as a stage Psychiatr J Univ Ott. 1990 Mar; 15(1):44-6. . View in PubMed

A classification system for misidentification syndromes Psychopathology. 1990; 23(1):27-32. . View in PubMed

Judicial discharge of involuntary patients Psychiatr Q. 1990; 61(2):135-41. . View in PubMed

Economic motivation for smoking cessation in chronic psychotic patients Acta Psychiatr Scand. 1989 Dec; 80(6):657-8. . View in PubMed

Narcolepsy, paranoid psychosis, and analeptic abuse Psychiatr J Univ Ott. 1989 Sep; 14(3):481-3. . View in PubMed

Factitious AIDS in a psychiatric inpatient Can J Psychiatry. 1989 May; 34(4):320-2. . View in PubMed

Civil commitment Hosp Community Psychiatry. 1989 Feb; 40(2):192. . View in PubMed

An HIV-infected psychiatric patient: some clinicolegal dilemmas Bull Am Acad Psychiatry Law. 1989; 17(1):33-43. . View in PubMed

A case of skin and ear self-mutilation Psychosomatics. 1989; 30(2):228-30. . View in PubMed

Behavioral science and the juvenile death penalty Bull Am Acad Psychiatry Law. 1989; 17(3):301-9. . View in PubMed

Capgras syndrome and dangerousness Bull Am Acad Psychiatry Law. 1989; 17(1):5-14. . View in PubMed

Carbamazepine use in assaultive patients Psychosomatics. 1988; 29(3):367. . View in PubMed

Competency issues in referrals Psychosomatics. 1988; 29(1):140-1. . View in PubMed

Ethical considerations of clinical use of Miranda-like warnings Psychiatr Q. 1988; 59(4):293-305. . View in PubMed

Outpatient civil commitment Am J Psychiatry. 1987 May; 144(5):694-6. . View in PubMed

Delusion of exchanged doubles in an immigrant: a new Capgras variant? Int J Soc Psychiatry. 1987; 33(4):299-302.. View in PubMed

Serum folate levels in US. psychiatric inpatients. J Clin Psychiatry. 1986 Feb; 47(2):98-9. . View in PubMed

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