Forensic Psychology Flashcards
(193 cards)
What is Profiling?
The idea you can make assumption about characteristics of an offender by analysing the offence they commit
What is the Top-down approach?
An approach with a focus on extreme crime such as rape and murder
It is where profilers start with a pre-established typology at a crime scene to organise offenders into one of two categories, organised/disorganised.
What is the basic premises for offender profiling in the top-down approach?
- That information left at the scene of a crime tells us about the type of offender
- This behaviour will be consistent with their everyday behaviour
- This helps to narrow down potential suspects
What are the four stages of the top-down approach?
- Data Assimilation
- Crime Scene Classification
- Crime Reconstruction
- Profile Generation
What is Data Assimilation?
Investigators gather together information from multiple sources e.g. crime scene photos, police reports, pathologists’ reports.
What is Crime Scene Classification?
Profilers decode whether the crime scene represents an organised or disorganised offender
What is Crime reconstruction?
Hypotheses are generated about what happened during the crime e.g. victim behaviour, crime sequence
What is Profile generation?
Profilers construct a “sketch” of the offender including demographic and physical characteristics, behavioural habits.
According to Hazelwood and Douglas (1980) what are the characteristics of an organised offence?
- Planned
- Show’s self control
- Lack of evidence at the scene
- Targeted victim and tries to control the victim
- Weapon hidden
According to Hazelwood and Douglas (1980) what are the characteristics of an organised offender?
- Above average IQ
- Socially and Sexually Competent
- Married/cohabiting
- Anger or depression at the time of the offence
- Skilled occupation
According to Hazelwood and Douglas (1980) what are the post offence behaviours of an organised offender?
- Returns to the crime scene
- Volunteers information
According to Hazelwood and Douglas (1980) what are the characteristics of a disorganised offence?
- Unplanned/spontaneous
- Likely to leave evidence at the scene
- Victim randomly selected
- Minimum use of constraint
- Disorganised behaviour
According to Hazelwood and Douglas (1980) what are the characteristics of a disorganised offender?
- Lives alone, near the crime scene
- Socially and sexually inadequate
- Physically or sexually abused in childhood
- Frightened/confused at the time of the offence
- Low intelligence/no occupation
According to Hazelwood and Douglas (1980) what are the post offence behaviours of a disorganised offender?
- Returns to the crime scene to relive the offence
- Keep diary
- Keep news articles of the incident
What is the Research for Top-down Approach?
- FBI investigators initially carried out structured interviews with 36 serial sex murderers, including Ted Bundy and Charles Manson covering:
1) What led to the offending
2) What early warning signs there were
3) What encouraged or inhibited offences etc. - From interview responses, plus a thorough analysis of the details of their crimes by Behavioural Science Unit they categorised offenders of serious crimes into organised and disorganised offenders
Advantage of Top Down Approach AO3
Copson (1995)
- Copson (1995) interviewed 184 police officers and 82% officers interviewed said it was useful and 90% said they would use it again
Advantage of Top Down Approach AO3
FBI
- FBI’s systematic approach has been enormously influential -> Adopted by law enforcement agencies all over the world, who have adapted and enhanced it
Advantage of Top Down Approach AO3
Clarke and Morely (1988)
- Challenges the stereotypes that investigators may hold about offenders and which may mislead investigations
e.g
Clarke and Morley (1988) interviewed 41 convicted rapists responsible for over 800 offences and found out, contrary to the stereotype of an inadequate loner, they were typically very average men, living in normal family circumstances, often intelligent and in skilled employment
Advantage of Top Down Approach AO3
Ainsworth (2001)
- Ainsworth (2001) suggests that offender typologies are potentially very useful in allowing offences to be linked and facilitating predictions about the timeframe of the next attack and how the series of offences is likely to develop
Disadvantage of Top Down Approach AO3
Wilson et al (1997)
- A typological approach to profiling assumes that offenders are one thing or the other and that this is stable over time
- Wilson et al (1997) suggested that neither assumptions is correct: most offenders show both organised and disorganised features in their crimes and they may shift from one to the other between crimes
Disadvantage of Top Down Approach AO3
Subjective
- It is up to the profiler to decide which aspects of the crime scene evidence are important in determining the profile
- Consequently, different profilers may reach different conclusions from the same evidence
Disadvantage of Top Down Approach AO3
Lack of Validity
- The sample of 36 offenders is very small and the methods and motives of the very rare types of offender interviewed may not generalise to tother offenders
Disadvantage of Top Down Approach AO3
Ainsworth (2001)
Ainsworth (2001) points out that there have been few serious attempts to establish the validity of the FBIs offender types using scientifically verifiable methods
What is the Bottom-up approach?
- An approach which starts with raw data about the crime and makes it way up to a conclusion about the criminal
- Assumes that offenders leave a “psychological fingerprint” of unique behaviour (offenders will behave consistently across a series of crimes)
- Identified consistencies within the behaviour of offenders and identifiable differences between offenders