The likelihood of a sexual predator being charged with an additional sexual offense after being released from prison is actually less likely, just purely statistically speaking, than an armed robber or arsonist. That being said, there are many reasons for this. The primary one is that sexual predators are very rarely caught. In self report questionnaires, so this is information freely volunteered by the predators themselves, on average they admit to preying on five times the number of victims that they were convicted for initially. So using whether they were charged again as an indicator of likelihood of reoffence is problematic if their chance of getting caught is relatively low. In addition, despite over six decades of study, very little is known about the psychology of sexual predators. There’s no strong correlation between any specific type of mental illness and likelihood of becoming a predator, and thus no specific mental health treatment has been effective. Further more, the likelihood of an offender reoffending is most likely within the first year of being released, but after the first year the likelihood of reoffending doesn’t drop again until after thirty years pass. You could have a model citizen for twenty nine years, but then they offend again. In order to try a rehabilitation of sexual predators, it’s going to take a much better understanding of their psychology and treatment options before I’m personally comfortable with a release back into society.