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Spatial Characteristics of Serial Sexual Assault in New Zealand

Spatial Characteristics of Serial Sexual Assault in New Zealand. Dr Samantha Lundrigan Victoria University of Wellington. Research Aims. To examine the characteristics of New Zealand sex offenders with respect to: Spatial behaviour Consistency in offence environment selection.

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Spatial Characteristics of Serial Sexual Assault in New Zealand

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  1. Spatial Characteristics of Serial Sexual Assault in New Zealand Dr Samantha Lundrigan Victoria University of Wellington

  2. Research Aims • To examine the characteristics of New Zealand sex offenders with respect to: • Spatial behaviour • Consistency in offence environment selection

  3. The New Zealand Context • 4million in a land area of 268,680 km sq. • 92% rural land, 8% built up. • 2001 population density of 14 per km sq.

  4. Data collection • Police files – New Zealand Police Criminal Profiling Squad • Crime scene, background and geographical information coded and mapped

  5. The sample • 76 serial offenders • Between 1970 and 2002 • Collectively 270 offences (mean of 3.5 per series) • Characteristics • 70% strangers, 20% friend/associate, 1% previous partner • Mean age of 23 (12-60) • 53% NZ Maori, 21% NZ European, 18% Pacific Island People

  6. Results

  7. Journey to crime

  8. Criminal Range r = 0.470 (P<.001)

  9. Spatial pattern • Marauders 37%, Commuters 34%, Transients 29% * p<.05 ** p<.01

  10. Environmental consistency • Variables • Type of contact site • Victim transportation • Day of week • Time of day • Distance to offence • Area type • Land use • Deprivation score

  11. Consistency score • Mean 4.56, Median 4.79, Standard deviation 1.70 • Min 1, Max 8

  12. Consistency score • 44 (57%) of offenders scored above 4, the score midpoint. • Proportional chance expected 2.5% of offenders (z=45.42, p<.0001).

  13. Future Research • More detailed analysis of environmental characteristics • Offender-offence environment consistency • Implications for Geographic profiling systems

  14. Thank you • Dr Samantha Lundrigan Institute of Criminology Victoria University of Wellington Wellington New Zealand Samantha.lundrigan@vuw.ac.nz

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