Forensic expert witness Dr David Harvey joined YPP in June 2015. Dr Harvey has practised in a variety of health and forensic settings, including prisons, secure hospitals and probation. In his current NHS work, he provides psychological assessment, supervision and consultation with high-risk offenders who may attract a diagnosis of personality disorder and are in custody or in the community on license. He is trained by the British Psychological Society as an expert witness and provides psychological assessment and expert witness services in criminal proceedings, particularly in relation to adult mental health, personality disorder, risk assessment of violence, suggestibility, intellectual functioning and psychological understandings of offending behaviours, such as violence, sexual offending, stalking and arson. He also offers independent psychological and risk assessments of prisoners with an indeterminate sentence for parole proceedings.