Psychopathy among condemned capital murderers.

Area of Science:

• Forensic Psychology
• Clinical Psychology
• Criminology

Background:

• Psychopathy is a critical construct in forensic mental health.
• Research on psychopathy in capital murder convicts is limited.
• Understanding psychopathy in this population is crucial for legal and clinical contexts.

Purpose of the Study:

• To investigate the prevalence and characteristics of psychopathy in individuals convicted of capital murder.
• To examine the relationship between psychopathy and other forensic/clinical variables in this sample.

Main Methods:

• Archival data from 636 individuals convicted of capital murder in California were analyzed.
• Psychopathy was assessed using the Psychopathy Checklist - Revised (PCL-R).
• Criminal career data and other behavioral disorders were extracted for correlational analysis.

Main Results:

• The mean PCL-R score was 23.31, with one-third of the sample meeting criteria for clinical psychopathy (score ≥ 30).
• Factor analysis supported four facets of psychopathy: affective, interpersonal, lifestyle, and antisocial.
• Psychopathy scores positively correlated with Antisocial Personality Disorder, Conduct Disorder, sexual sadism, ADHD, arrest charges, and prison sentences, and negatively with age of arrest onset.

Conclusions:

• Individuals convicted of capital murder exhibit significant heterogeneity in psychopathy.
• Psychopathy is associated with various forensic and clinical indicators in this high-risk group.
• Findings underscore the importance of assessing psychopathy in capital murder cases.