Case history of co-morbid Asperger's syndrome and paraphilic behaviour.

We report a case of a man with Asperger's syndrome, paraphilic behaviour and convictions for sexual offences. We describe his assessment within a secure mental health setting to determine issues of diagnosis, treatment and risk. We also highlight the difficulty in reducing the risk of further offending because of the apparent ineffectiveness of interventions for the small group with Asperger's syndrome and an offending history. Consequently, they are likely to face long periods in institutional settings.