“…Studies have shown that comorbidity among psychiatric disorders is prevalent; more than half of individuals with a lifetime history of one psychiatric disorder have a second diagnosis (Kessler, 1994(Kessler, , 1995. Although the causal association between criminality and comorbidity is not clear, limited research shows that comorbidity is associated to violence and crime (Friedman, 1998;Hodgins, 1993;Hodgins & Janson, 2002) and other analogous behaviors such as conflictual social relationships (Forthofer, Kessler, Story, & Gotlib, 1996;Silver, 2002), accidents, fights, and drunken driving arrests (Tomasson & Vaglum, 1998), and violent incidents (Mulvey, 1994). Specifically, studies have found that various combinations of mental disorders are associated with violence and crime (Hodgins, 1993;Hodgins & Janson, 2002).…”