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Offenders: Serial Offending and Prior Bad Acts. Serial Rape by Undetected Rapists. 63% had committed other rapes 483 total rapes/attempted rapes average of 4 rapes per rapist. 1,882 men assessed: 120 rapists. Serial Offending by Undetected Rapists. 14% other forms of sexual assault
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Serial Rape by Undetected Rapists • 63% had committed other rapes • 483 total rapes/attempted rapes • average of 4 rapes per rapist 1,882 men assessed: 120 rapists
Serial Offending by Undetected Rapists • 14% other forms of sexual assault • 17.5% sexual abuse of children • 10.8% physical abuse of children • 38.3% battery of adult partner 58% of rapists were serial offenders
Serial Offending by Undetected Rapists • 483 rapes and attempted rapes • 17 other sexual assaults • 319 acts of sexual abuse against children • 95 acts of physical abuse against children • 275 acts of battery against adult partners • Total = 1,225 offenses
Serial Rapists 76 men Single-act Rapists 439 rapes & attempted rapes 44 men 44 rapes & attempted rapes Non Rapists1762 men
Violence Committed by Serial Rapists The 76 Serial Rapists Committed: • 439 rapes/attempted rapes • 49 sexual assaults • 214 acts of battery of partners • 66 acts of physical abuse of children • 277 acts of sexual abuse of children • 1045 total acts of violence
Serial Rape by Incarcerated Rapists Abel et. al., 1987 126 rapists committed 907 rapes against 882 victims Weinrott & Saylor (1991) 37 rapists charged with 66 rapes later admitted to 433 rapes
Detecting Multiple Offending Chambers (1994): 36 adolescent sex offenders In treatment: revealed 111 victims Threatened with polygraph: 188 victims Under polygraph: 207 victims
The “Undetected” Rapist Special Considerations in Investigations • Have a smooth interpersonal style • Be psychologically sophisticated • Quickly shift focus to behavior of victimto undermine her credibility & lay foundation of “consent defense” Offender is likely to:
The “Undetected” Rapist Special Considerations in Investigations • Can “he said-she said” problem be solved? • Remember: majority are serial offenders • Investigate offender’s social networks • Interview old girlfriends & dates • Check for prior complaints/restraining orders Possible Avenues of Investigation