Personality disorder and offending in people with learning disabilities

This article reviews the literature on personality disorder in offenders with learning disabilities, using Medline, PsychoInfo and CINAHL databases, and search terms ‘offending’, ‘personality disorder and intellectual disabilities’, ‘learning disabilities’ and related terms. Methods of defining offending population, personality disorder and learning disabilities vary greatly, and few studies focus specifically on personality disorder, learning disability and offending. The definition of learning disability often encompasses both borderline learning disability and low average intelligence. Personality disorder, especially anti‐social personality disorder, is prevalent in offenders with learning disabilities, but less than in the general population, and is associated with higher levels of security and poorer outcomes. The study concludes that there is a continuum of offenders with borderline and mild learning disabilities, reflected in learning disability forensic services.