It may run counter to conventional wisdom, but it is exceedingly rare for a person registered as a sex offender to be charged with a new sexual offense in Cumberland County.
Of the 75 charged sex crime cases in Cumberland County in 2016, only two were committed by a person listed on the sex offender registry, according to an analysis of court records conducted by The Sentinel.
Neither of those offenses involved a direct assault on a child.
Of the more than 300 charged sex crime cases in Cumberland County between 2013 and 2016, only six cases involved a person listed on the sex offender registry.
Those stats show that the more than 290 remaining cases — including some of the most heinous sexual assaults against children — were committed by people who were not registered.
http://cumberlink.com/news/local/closer_look/digital_data/crime-review-a-look-at-the-effectiveness-of-sex-offender/article_a9923f58-9d65-5379-9670-eb08ad9d6620.html
Please google Dr.Aaron T. Beck the government has had this information since the 1950 and before. N.I.H.