WJEC A2 Psychology PY4 - Offender Profiling
3 Theories of Offender Profiling
- Created by: Zoey Jowett
- Created on: 04-11-12 10:37
FBI Approach
1. FBI approach (top down), Crime Scene Analysis, Typological, US Approach (1970s)
- FBI accumulated data from officers' experiences of sexual offences/murder
- Douglas + Ressler carried out extensive interviews with an opportunity sample of 36 American convicted serial murderers (almost all had sexual motive for crime)
- information the FBI gained from interviews enabled them to identify major personality/behavioural characteristics possessed by serious offenders and how they differed from the general public - placed onto a database
- classified offenders into 2 typologies: organised and disorganised - D+R believed 24 of interviewees = organised, other 12 disorganised
- organised offenders = planned + controlled, evidence destroyed, intelligent, socially + sexually competent = disorganised offenders would be the opposite
- suggested organised offenders had 'mask of normality' = hides antisocial, psychopathic personality and would follow newspaper reports about offence
- disorganised offender committed crime as a result of being frightened/confused
- known as top down approach = when examining crime scene, start with the preconception that the offender is either organised/disorganised so classifies evidence into those categories
FBI Approach
EVALUATION (based on D+R's interviews with 36 American convicted serial killers)
(-) Unconvicted murderers
- possible that more successful murderers who were not caught may possess different characteristics that don't fit into 2 categories
(-) Classification based on retrospective self-report of offenders
- questions reliability/validity as relying on psychologically unstable murderers to determine characteristics and how to construct profile from evidence
(-) Ethnocentric
- database created from interviews on American offenders = limited generalisability to offenders in other countries
(+) Suspect pool: FBI profiling helps to narrow down suspect pool when major personality/behavioural characteristics are identified from crime scene
FBI Approach
(-) Profiling is subjective
- this method of profiling is neither objective nor scientific
- two profilers may interpret evidence at a crime scene differently = look for different types of offenders, relies on personal intuition = lacks inter-investigator reliability
(-) Lack of scientific support
- lack of scientific support for differences between organised and disorganised
- Canter (2004) found murderers are rarely disorganised in review of 100 US killers
- FBI profiling doesn't identify what causes differences between 2 categories
(-) Wilson et al (1997)
- argues inappropriate to classify serial offenders into 2 categories
- eg offender's first offence = disorganised but perfects technique = organised
(+) Success: despite criticisms, FBI profiling methods have resulted in high number of dangerous individuals being arrested eg Arthur Shawcross
Canter's Approach
2. Investigative Psychology (bottom up), David Canter, statistical profiling, UK approach
- David Canter = leading forensic psychologist in UK and big critic of FBI profiling
- Canter's research focused on establishing the extent to which offender's behaviour during a crime mirrors behaviour in everyday life
- how individual interacts with others is so ingrained that all interactions similar, in everyday life or as an offender = 'The Criminal Consistency Hypothesis'
- suggests criminal actions at scene of crime provide valuable info about background eg conceals evidence = no previous convictions
- location of crime significant = offenders feel more in control in familiar area
- different types of crimes committed by people with differing domestic/social background eg sexually naive ****** = little sexual experience, no sexual relationship
- Canter created 5 Major Model to consider when examining evidence:
- 1. Interpersonal coherence: offender will treat victim in similar way that they treat people in everyday lives, victim may represent significant person in offender's life
- 2. Significance of time and place: provides info about offender mobility, possible residential locations, time of attack provides insight into work/free time schedule
- 3. Criminal Characteristics, 4. Criminal Career, 5. Forensic Awareness
Canter's Approach
EVALUATION
(+) Canter's development of approach
- Canter conducted detailed statistical analysis to identify common characteristics and certain features that are rare, so more distinctive = FBI didn't do
- these distinctive features that Canter believes help investigators glean useful info
(+) John Duffy, the Railway ******
- Canter's profiling convicted John Duffy who fitted profile (13/17 factors), supports
(+) Differences from FBI profiling
- Canter didn't place offenders in rigid typologies, suggested careful examination of interaction between offender and victim = yield aspects of offender's everyday life
(-) Alison (2002): argues in the 'person x situation effect' person's behaviour will be different and not consistent in different situations
Canter's Approach
(+) Canter's research
- has been published and can therefore be replicated by others (eg Canter + Heritage, 1990), who wish to establish its reliability
- main strength when comparing approach to FBI profiling, supports
(-) Dark figure crimes
- official crime stats that Canter uses come only from recorded/reported crimes
- doesn't represent dark figure crimes which could reveal more about profiling and interaction between offender and victim, weakens theory
(-) Police focus
- profiling can lead police to concentrate too much on individual who matches profile when should perhaps keep more open mind as to who perpetrator is
- eg ****** may entirely conceal evidence = suggest forensically aware = may lead police to look for someone with previous conviction - ****** may have been involved in previous crimes but not been caught = no previous convictions
Geographical Profiling
3. Geographical Profiling
- techniques making inferences about criminals from location/timing of offences
- techniques include Routine Activity Theory (RAT), Mental Maps, Timing of Offences and Circle Theory of Environmental Range
- Stuart Kind (1987) first person to incorporate use of geographical models when assigned to Yorkshire Ripper enquiry = determined where the perpetrator lived
- first systematic attempt to understand patterns of offending made by Simon Fraser and Kim Rossmo in 1989
- found by extensively mapping criminal behaviours, certain geographical/social conditions could be linked to distribution of crime in American cities
- RAT = criminals operate within areas come to know before offending (Felson)
- Mental Maps = individually constructed on experience/perspective of area
- Timing of Offences = info about geographical location of crime, which becomes more useful when combined with info about when offences occurred
- Circle Theory of Environmental Range = Canter + Larkin (1993) suggested a circle drawn to encompass all crimes in series likely to contain offender's base
Geographical Profiling
EVALUATION (with the Circle Theory)
(+) Canter and Godwin (1997)
- when line is drawn from 2 crime locations furthest from each other in distance, and circle is drawn with this line as diameter, 85% of offenders live within circle
- demonstrates Circle Theory can identify location of offenders based on geo data
(+) Davies and Dale (1995)
- found that in 75% of **** cases, offender lived within 5 mile radius of offence
- supports use of geo profiling as seems to be a pattern for where and when a crime takes place based on where offender lives
(-) Koscis + Irwin (1997)
- studied several cases where series of burglaries had been committed by same offender in New South Wales, Australia
- found in only half of the cases, offender lived within circle of their crimes
Geographical Profiling
(-) Offences by the same person?
- in very large cities, 100s of crimes committed daily
- very difficult to work out whether 2 + offences committed by the same person
- therefore difficult to plot with any certainty crimes committed by same person on a map
(?) All types of crime
- Circle Theory may apply to most cases of murder + **** but not necessarily all types of crimes
(-) Dark figure crimes
- police + profilers may not be aware of all crimes committed and therefore cannot plot them
- in addition, plotted crimes based on official crime statistics - only reported/recorded crimes, there is a possibility dark figure crimes could reveal more about where offenders live
Related discussions on The Student Room
- Accredited Psychology issues »
- What is your Method to remembering AO3 Evaluation Points in Psychology? »
- AQA A-level psychology help »
- help 😭 »
- help 😭 »
- Question: »
- Websites like freeexampapers.com / Archived Past Papers »
- University of Edinburgh vs BTEC and WJEC »
- BTEC criminology »
- Websites similar to physics and maths tutor for a level business »
Comments
No comments have yet been made