Adolescent offenders are known to have high levels of mental health problems when compared with other populations of young people. Studies in the UK (Chitsabesan et al. 2006; Kroll et al. 2002) and internationally (Teplin et al. 2002; Vreugdenhil et al. 2004) consistently identify higher levels of morbidity than among the general adolescent populations of the same countries (Costello et al. 1996; Meltzer et al. 2000). These high levels of morbidity are associated with poor outcomes into adulthood, including

continuing mental health problems (Maughan & Kim-Cohen 2005), and further offending (Rutter et al. 1998).