Appendix 15

1
Appendix 15

• Offenders Serial Offending and Prior Bad Acts

2
Serial Rape by Undetected Rapists
1,882 men assessed 120 rapists

• 63 had committed other rapes
• 483 total rapes/attempted rapes
• average of 4 rapes per rapist

3
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
4
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

5
Serial Rapists
76 men
Single-act Rapists
439 rapes attempted rapes
44 men
44 rapes attempted rapes
Non Rapists1762 men
6
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

7
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

8
Detecting Multiple Offending

• Chambers (1994) 36 adolescent sex offenders
• In treatment revealed 111 victims
• Threatened with polygraph 188 victims
• Under polygraph 207 victims

9
The Undetected Rapist
Special Considerations in Investigations
Offender is likely to

• Have a smooth interpersonal style
• Be psychologically sophisticated
• Quickly shift focus to behavior of victimto
  undermine her credibility lay foundation of
  consent defense

10
The Undetected Rapist
Special Considerations in Investigations
Possible Avenues of Investigation

• Can he said-she said problem be solved?
• Remember majority are serial offenders
• Investigate offenders social networks
• Interview old girlfriends dates
• Check for prior complaints/restraining orders