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XYY genotype and crime: 2 cases
1Central Mental Hospital, Dundrum, Dublin, Ireland.
Medicine, Science, and the Law
|July 1, 1992
Summary
Men with the 47, XYY genotype are often debated for links to criminal behavior. This review examines XYY males and criminality, highlighting the need for forensic psychiatrists to be aware of these associations.
Area of Science:
- Genetics
- Forensic Psychiatry
- Criminology
Background:
- The 47, XYY genotype, a chromosomal variation, has been historically linked to increased aggression and criminal behavior.
- Debate continues regarding the extent to which this genotype predisposes individuals to violent tendencies compared to the typical 46, XY genotype.
Observation:
- This study reviews existing literature on XYY males and their association with criminal behavior and psychopathology.
- Two case studies of men with the 47, XYY genotype who committed murder are presented to illustrate the complexities.
Findings:
- The review indicates a complex relationship between the 47, XYY genotype and criminal behavior, with no definitive causal link established.
- Psychopathology may play a significant role in the observed criminal behavior in some XYY individuals.
Implications:
- Forensic psychiatrists must be aware of the potential legal and clinical implications when treating patients with the 47, XYY genotype.
- The association between XYY genotype and criminality may be a relevant factor in legal proceedings and sentencing.