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This study challenges these assumptions by examining the life course offending trajectories of 780 convicted adult male sexual offenders. The men were referred to the Massachusetts Treatment Center for civil commitment between 1959 and 1984. The changing number of both sexual and any offenses were examined by age using Group-Based Trajectory Modeling. We identified a four-trajectory model for all offending and a four-trajectory model for sexual offending. The identified groups varied in several offending patterns including criminal onset, length of criminal careers, age of peak offending, and time of entry into the treatment center. Late adult onset of sex offending was found to be associated with child molestation, whereas early-onset trajectories were associated with rape. Implications for future research and policy are discussed.<\/jats:p>","DOI":"10.1177\/1079063213492341","type":"journal-article","created":{"date-parts":[[2013,7,9]],"date-time":"2013-07-09T00:12:08Z","timestamp":1373328728000},"page":"311-329","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":28,"title":["Sexual and General Offending Trajectories of Men Referred for Civil Commitment"],"prefix":"10.1177","volume":"26","author":[{"given":"Brian","family":"Francis","sequence":"first","affiliation":[{"name":"Department of Mathematics and Statistics, Lancaster University, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Danielle Arlanda","family":"Harris","sequence":"additional","affiliation":[{"name":"Department of Justice Studies, San Jose State University, CA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stephanie","family":"Wallace","sequence":"additional","affiliation":[{"name":"Department of Mathematics and Statistics, Lancaster University, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Raymond A.","family":"Knight","sequence":"additional","affiliation":[{"name":"Department of Psychology, Brandeis University, MA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Keith","family":"Soothill","sequence":"additional","affiliation":[{"name":"Department of Mathematics and Statistics, Lancaster University, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2013,7,8]]},"reference":[{"key":"bibr1-1079063213492341","doi-asserted-by":"publisher","DOI":"10.1177\/107906329901100202"},{"key":"bibr2-1079063213492341","doi-asserted-by":"publisher","DOI":"10.1007\/s10940-005-9001-8"},{"key":"bibr3-1079063213492341","doi-asserted-by":"publisher","DOI":"10.1023\/A:1023050103707"},{"key":"bibr4-1079063213492341","volume-title":"Latent class and latent transition analysis: With applications in the social, behavioral, and health sciences","author":"Collins L. 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