What does an offender profiler do?
Looks at additional clues at the crime scene or from witnesses/victims to build up a picture of the offender
Additional clues include the type of victim, crime, location, time of day, etc
What are the two types of offender profiling?
FBI: Top down
British: Bottom up
How was the FBI: Top down model created?
Based on interviews with 36 sexually-motivated murderers they recorded warning signs, what led to the offences and what encouraged them to continue - they built up a picture of traits held by them and from that distinguished two types of offenders
What does the FBI: Top down model do?
Analyses crimes and crime scenes to determine the likely killer from predetermined categories
What are the two types of offences/offenders?
Organised
Disorganised
What are the characteristics of an organised offence?
-planned
-show self-control
-leaves few cues
-victim as targeted stranger
-attempts to control victim
What are the characteristics of an organised offender?
-above average IQ
-socially and sexually competent
-married/co-habiting
-experiencing anger/depression at the time of offence
-follows media coverage of the crime
-skilled occupation
What are the characteristics of an disorganised offence?
-little planning/preparation
-little attempt to hide evidence
-minimum use of constraint
-random, disorganised behaviour
What are the characteristics of an disorganised offender?
-lives alone, near to crime scene
-sexually and socially inadequate
-unskilled occupation or unemployed
-physically/sexually abused in childhood
-frightened/confused at time of attack
What four steps are used in the FBI: Top down approach?
What is a strength of the FBI model?
Evidence of its success- Ault and rese (1980)- looked at a rape case from 1979- top-down approach narrowed it down to 40 suspects straight away and arrest was made within a week
What are the limitations of the FBI model?
Small sample- original interviews used 36- also unstructured- ungeneralisable- specific type of offence- lots of detail is hard to analyse- individual differences
Categories not mutually exclusive- may not fit into one category (Godwin 2002)- may have organised personality traits but spontaneous and disorganised offences- e.g. Ted Bundy left evidence at later crime scenes etc but was an organised personality type
Douglas et al (1992)- third category as mixed offender
Assumes personality determines criminality- can be influenced by external factors- situations influence behaviour and the situation of the crime is assumingly different to normal situations- makes building a profile harder