Psychopathic offenders show a persistent pattern of emotional unresponsivity to the often horrendous crimes they perpetrate. Recent studies have related psychopathy to alterations in white matter. Therefore, diffusion tensor imaging followed by tract-based spatial statistics (TBSS) analysis in 11 psychopathic offenders matched to 11 healthy controls was completed. Fractional anisotropy was calculated within each voxel and comparisons were made between groups using a permutation test. Any clusters of white matter voxels different between groups were submitted to probabilistic tractography. Significant differences in fractional anisotropy were found between psychopathic offenders and healthy controls in three main white matter clusters. These three clusters represented two major networks: an amygdalo-prefrontal network, and a striato-thalamo-frontal network. The interpersonal/affective component of the PCL-R correlated with white matter deficits in the orbitofrontal cortex and frontal pole whereas the antisocial component correlated with deficits in the striato-thalamo-frontal network. In addition to replicating earlier work concerning disruption of an amygdala-prefrontal network, we show for the first time that white matter integrity in a striato-thalamo-frontal network is disrupted in psychopathic offenders. The novelty of our findings lies in the two dissociable white matter networks that map directly onto the two major factors of psychopathy.

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The impact of cognitive-behavioral interventions was assessed for 28 low-moderate risk and 20 high-risk sexual offenders on conditional release to the Greater Toronto Area. Goal Attainment Scaling (GAS--T. Hogue, 1994) for sexual offenders was used to rate clinical and motivational elements of treatment taken from reports written at pretreatment, posttreatment, and after 3 months of community follow-up. Results indicated that both groups of offenders benefited from treatment, although low-moderate risk offenders showed consistently better results on all measures. Performance along nonrelapse prevention related dimensions increased from pretreatment to posttreatment and remained relatively steady in the community. Relapse prevention related treatment components showed a steady increase from pretreatment throughout follow-up in the community for low-moderate risk offenders, but not for high-risk offenders. Both groups improved substantially in level of motivation from pretreatment to posttreatment; however, only those in the low-moderate risk group maintained their motivation levels once released to the community. These results are discussed with respect to the effectiveness of cognitive-behavioral treatment of sexual offenders.

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Attachment experiences have been regarded as significant by researchers and clinicians attempting to explain the etiology of sexual offending. Although initial studies have revealed some promising evidence, there are a number of theoretical and methodological problems with this preliminary body of work. While addressing these limitations, the goal of the present study was to investigate state-of-mind regarding childhood attachment among subtypes of sexual offenders, comparing them to both a sample of nonsexual offenders and to the documented patterns of nonoffenders. Sixty-one sexual offenders (extrafamilial child molesters, incest offenders, and rapists) and 40 nonsexual offenders (violent and nonviolent) were administered the "Adult Attachment Interview." Results indicated that the majority of sexual offenders were insecure, representing a marked difference from normative samples. Although insecurity of attachment was common to all groups of offenders, there were important differences in regard to the specific type of insecurity. Most notable were the child molesters, who were significantly more likely to be Preoccupied. Rapists, violent offenders, and, to a lesser degree, incest offenders were more likely to be Dismissing. Although still most likely to be Dismissing, nonviolent offenders were comparatively more Secure.