Forensic Psychology (P3) Flashcards
(127 cards)
Define the term offender profiling
Offender profiling: The top-down approach
A behavioral and analytical tool that is intended to help investigators accurately predict and profile the characteristics of unknown offenders
Define the term top-down approach
Offender profiling: The top-down approach
Profilers start with a pre-establisge typology and work down to lower levels in order to assign offenders to one of two categories based on witness accounts and crime scene evidence
Define the term organised offender
Offender profiling: The top-down approach
An offender who shows evidence of planning, target a specific victim and tends to be socially and sexually competent with higher than average intelligence
Define the term disorganised offender
Offender profiling: The top-down approach
An offender who shows little evidence of planning, leaving clues and tends to be socially and sexually incompetent with lower than average intelligence
What are characteristics of organised offender?
Offender profiling: The top-down approach
- Deliberately targets victim. Has a type
- High degree of conrol. Operate with detached surgical precision
- Above average intellegicence
- Skilled, professional occupation
- Socially and sexually competent (may be married)
What are characteristics of a disorganised offender?
Offender profiling: The top-down approach
- Impulsive
- Lower than average IQ
- Unskilled work/unemployed
- History of sexual dysfunction and failed relationships
- LIve alone
- Live relatively close to crime scene
How to construct an FBI profile?
Offender profiling: The top-down approach
- Data assimilation - profiler reviews the evidence (crime scene photographs, pathology reports, witness reports etc)
- Crime scene classification - disorganised or organised
- Crime reconstruction - Hypothesis in terms of sequence of events, behaviour of the victim etc
- Profile generation - Hypotheses related to the likely offender e.g. physical characteristics, behavioure etc
What are strengths?
Offender profiling: The top-down approach
- Research support
- Wider application
1.** David Canter et al (2004)**. Conducted an analysis of 100 US commited by different serial killers. Technique called smallest space analysis was used (a statistical technique that identifies correlations across different samples of behaviour). Analysis used to assess the co-occurence of 39 aspects of serial killings including cause of death, murder weapon etc. Found that there seems to be a subset of features of many serial killings which mached the FBIs typologu for organised offenders. Validity.
COUNTERPOINT: Godwin (2002) it’s difficult to classify killers as one or the other type. A killer may have multiple contasting characteristics such as high intellegince and sexual competence but commits spontaneous murders leaving the body. Suggests organised-disorganised typology is a continuum.
- Tina Meketa (2017) reports that top-down profiling has been applied to burgalry resulting in a 85% rise in solved cased in US. Adds 2 new categories interpersonal (offender usuallly knows their victims and steals something of significance) and oppurtunistic (generally inexperienced young offender). Wider application than was originally assumed
What are limitations?
Offender profiling: The top-down approach
- Flawed evidence
- Conflicting research
- Top-down profiling developed using interviews with 36 murders in the US 25 of which were serial killers, other 11 single or double muderers. At the end of the process 24 of these indivudals were classified as organised offenders and 12 were disorganised. Canter et al argued that the sample was poor (not a random or large sample didn’t include different kinds of offenders). There was no standard set of questions so each interview was different and therefore not really comparable. Does not have a scientific basis
- Godwin (2002) it’s difficult to classify killers as one or the other type. A killer may have multiple contasting characteristics such as high intellegince and sexual competence but commits spontaneous murders leaving the body. Suggests organised-disorganised typology is a continuum.
Define the term bottom-up approach
Offender profiling: The bottom-up approach
Profilers work up from evidence collected from the crime scene to develop hypotheses about the likely characteristics, motivations and social background of the offender
Define the term investigative psychology
Offender profiling: The bottom-up approach
A form of bottom-up profiling that matches details from the crime scene with statistical analysis of typical offender behaviour patterns based on psychological theory
Aims to establish patterns of behaviour that are likely to occur or coexist across crime scenes
Investigative psychology
What is meant by interpersonal coherence?
Offender profiling: The bottom-up approach
The way an offender behaves at the scene including how they interact with victim, may reflect their behaviour in everyday situations
investigative psychology
What is meant by forensic awareness?
Offender profiling: The bottom-up approach
Describes individuals who have been the subject of police interagation before their behaviour may denote how mindful they are of ‘covering their tracks’
Define the term Geographical profiling
Offender profiling: The bottom-up approach
A form of bottom-up approach profiling basd on the principle of spatial constitency - that an offender’s operational base and possible future offences are revealed by the geographical location of their previous crimes
Canter’s circle theory
Offender profiling: The bottom-up apprach
- Serial offenders will restrict their ‘work’ to geographical areas they’re familar with and so understaing spatial pattern of behaviour provides a centre of gravity which is likely to include the offender’s base (often in middle of spatial pattern)
- Distribution of offences leads to 2 descriptions
1. The Marauder - operates in close proximity to their home bade
2. The Commuter - who is likely to have travel a distanced from their usual residence
Geographical profiling
What does spatial decision-making offer insight into?
Offender profiling: The bottom-up apprach
- Nature of offence
- Whether it was planned or oppurtunistic
- Mental maps
- Modes of transport
- Employment status
- Approximate age
What are limitations?
Offender profiling: The bottom-up apprach
Geographical information insufficient
May not be sufficient on its own. The success of geographical profiling may be reliant on the quality of data that the police can provide. Recording of crime isn’t always accurate, can vary between police forces and an estimated 75% of crimes aren’t reported. Questions utility of the approach which relies on accuracy of geographical data. Even if this information is correct critics claim that other factors are just as important in creating a profile such as the timing of the offence and the age and experiene of the offender (Ainsworth 2001). Geographical information alone may not always lead to the successful capture of an offender
What are strengths?
Offender profiling: The bottom-up approach
- Research support - investigative psychology
- Research support - geographical profiling
-
Canter and Heritage (1990)
Conducted an analysis of 66 sexual assault cases. Data was examined using smallest space analysis. Several behaviours were identified as common in different samples of behaviour such as the use of interpersonal language and lack of reaction to the victim. Each individual displayed a characteristic pattern of such behaviours and this can help with case linkage (whether 2 or more offences were committed by the same person). This supports one of the basic princples of the bottom-up approach that people are consistent in their behaviour
COUNTERPOINT: Case linkage depends on the database and this will only consist of historical crimes that have been solved. They may be solved because it was relatively straightfoward to link these crimes together which makes this a circular argument. Investigative psychology may tell us little about crimes that have few links between them and therefore remained unstudied
2. Lundrigan and Canter (2001)
Collated information from 120 murder cases involving serial killers from the US. Smallest space analysis revealed spatial consistency in the behaviour of the killers. The location of each body disposal site created a centre of gravity because when an offender starts from their home base they may go in a different direction each time they dump a body but in the end all these sites create a circular effect around the home base. Effect more noticable in marauders. Supports the view that geographical information can be used to identify an offender
How did Lombroso refer to criminals?
Biological explanations: An historical approach
Genetic throwbacks
(a primitive subspecies who were biologically different from non-criminals)
Suggested this in his book roughly translated as ‘the criminal man’
What were the biological suggestions?
Biological explanations: An historical approach
- Lack of evolutionary development, savage nature meants the wouldn’t be able to adjust to the demands of society
- Offending behaviour was innate thus offender isn’t responsible
What was meant by atavistic form?
Biological explanations: An historical approach
Offender subtype could be identified through physiological markers that were linked to particular offences
These are biologically determined atavistic characteristics (appearance)
Give examples of atavistic characteristics
Biological explanations: An historical approach
- Narrow sloping brow
- Strong prominent jaw
- High cheekbones
- Facial asymmetry
- Dark skin
- Extra toes/fingers/nipples
- Insensitivity to pain
- Use of slang
- Tattoos
- Unemployment
Description of murderers
Biological explanations: An historical approach
- Bloodshot eyes
- Curly hair
- Long ears
Description of sexual deviants
Biological explanations: An historical approach
- Glinting eyes
- Swollen fleshy lips
- Projecting ears