Important new study: Researchers followed violent offenders (sentenced to 2 years or more) for an average of 10 months following their release and ascertained the rate of violent re-offending. The study included 742 individuals without psychosis; 94 with schizophrenia; 29 with delusional disorder; and 102 with drug-induced psychosis. It also assessed whether the individual’s mental illness was treated in prison, after leaving prison, or not at all.