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                            Library & Multimedia
 Will History Repeat Itself? Growth Mixture Modeling of Suspected Serial Sexual Offending Using Forensic DNA Evidence
NCJ Number
              254191
Journal

*Journal of Criminal Justice* Volume: 61 Dated: April 2019 Pages: 1-12
Author(s)
          Rebecca Campbell;
                        Steven J. Pierce;
                        Wenjuan Ma;
                        Hannah Feeney;
                        Rachael Goodman-Williams
Date Published

April 2019
Length
              12 pages
Annotation
              This study used both criminal history records and forensic DNA evidence from sexual assault kits (SAKs; also termed 'rape kit') to identity a sample of 392 serial sex offenders, all of whom were suspected of committing two or more sexual assaults.
Abstract
              Sex offenders often commit more than one sexual assault, but there is variability in how many assaults they commit and in what pattern over time. Trajectory modeling studies typically use criminal history records as a data source to model perpetrators' sexual assault convictions, but this may underestimate the scope of offending, because so few sexual assaults result in a conviction. The current study used growth mixture models to identify and validate a four-class model of suspected serial sex offending that spanned ages 16 to 60. The four classes varied in the overall number of sexual assaults committed by each perpetrator and the ages of peak offending. All classes included sexual assaults identified through rape kit testing and through criminal history records. The study concludes that forensic DNA testing of rape kits can help identify suspected serial sexual offenders. DNA testing plus criminal history searches on identified offenders as standard investigation practice would provide police with a more complete picture of offenders' criminal behavior. (publisher abstract modified)
      
  
          Additional Details
Grant Number(s)
        2014-NE-BX-0006


  
  
        
  Agencies
        NIJ-Sponsored


  
  
        
  Publication Type
        Research (Applied/Empirical)
                                Report (Study/Research)
                                Report (Grant Sponsored)
                                Program/Project Description


  
  
        
  Award
        Serial Sexual Assaults: A Longitudinal Examination of Offending Patterns Using DNA Evidence
    
  
  
Date Published: April 1, 2019
    
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