Forensic Psych Flashcards
Offender Profiling
Also known as “criminal profiling”, a BEHAVIOURAL and ANALYTICAL tool, that is intending to help investigators ACCURATELY PREDICT and PROFILE the characteristics of UNKNOWN CRIMINALS.
Top - down approach
Profiler has EXPERIENCE. Profilers start with a PRE-ESTABLISHED TYPOLOGY and work down, in order to ASSIGN OFFENDERS to ONE of TWO CATEGORIES, based on WITNESS ACCOUNTS and EVIDENCE from the crime scene.
Organised Offender
Evidence of planning, targets victims, tends to be socially and sexually competent with higher than average intelligence eg. Ted Bundy.
Disorganised Offender
Little evidence of planning, leaves clues, tends to be socially and sexually incompetent, with lower than average intelligence.
Top Down Approach Info
- Originated in the US, as a result of work carried out by the FBI in the 1970’s.
- The FBI’s Behavioural Science Unit drew upon DATA gathered from in-depth INTERVIEWS, with 36 SEXUALLY MOTIVATED SERIAL KILLERS eg. Ted Bundy.
- Also known as the TYPOLOGY APPROACH, offender profilers who use this method will match what is KNOWN about the crime and offender to a PRE-EXISTING TEMPLATE created by the FBI.
- Murderers or rapists are CLASSIFIED into 1 of 2 categories (disorganised or organised) on EVIDENCE.
- This classification INFORMS the subsequent POLICE INVESTIGATION.
- The approach starts with the BIGGER picture and then FILLS in the DETAILS.
Organised Characteristics
- Victim targeted
- Monitors media coverage of crime
- Aggressive
- Controls conversation
- Weapon absent
- Crime scene orderly
- Highly intelligent
- Body transported from OG point of murder
- Attempts to clear up
- Socially competent
- Sexually competent
- Skilled occupation
- Inconsistent discipline as a child
- High birth order (eldest)
- Body hidden from view
Disorganised Characteristics
- Victim selected at random
- Average intelligence
- Aggressive
- Crime unplanned
- Avoids conversation
- Lives alone
- Lives/works close to the crime scene
- No interest in media coverage
- Poor work history
- Weapon present
- Sexual activity after death
- Body left in view
- Socially immature
- Sexually incompetent
- Harsh discipline as a child
- Low birth order (youngest)
Organised Offenders
Behaviour towards victim:
Aggressive
Victims are targeted
Crime scene detail:
Weapon absent
Crime scene orderly
Body transported from OG point of murder
Attempts to clear up
Body hidden from view
Characteristics of criminal:
Monitors media coverage of crime
Controls conversation
Highly intelligent
Socially competent
Sexually competent
Background of criminal:
Skilled occupation
High birth order (eldest)
Inconsistent discipline as a child
Disorganised Offenders
Behaviour towards victim:
Aggressive
Victims selected at random
Crime scene detail:
Crime unplanned
Weapon present
Sexual activity after death
Body left in view
Characteristics of criminal:
Average intelligence
Avoids conversation
Lives alone
Lives/works close to crime scene
No interest in media coverage
Socially immature
Sexually incompetent
Background of criminal:
Poor work history
Low birth order (youngest)
Harsh discipline as a child
Constructing an FBI Profile
1) Data assimilation - Information is gathered from the crime scene and other sources about exactly what happened. They will look at photos of the scene, forensic evidence, police reports etc.
2) Crime scene - A decision is made regarding whether the criminal appears to have planned the act (organised) or acted hastily in an unplanned way (disorganised).
3) Crime reconstruction - Hypotheses are generated about what probably happened during the crime scene eg. victim behaviour + sequence of events.
4) Profile generation - A rough sketch of the criminal is developed including social groups, appearance and likely behavioural traits.
A03) Top down approach
Weakness of RM) Only applies to particular crimes
P) Limitation of top-down profiling –> Best suited to crime scenes such as rape, arson + cult killings.
E) Used for crimes that involve such macbre practices such as sadistic torture, dissection of the body and acting out fantasies.
C) However, more common offences, such as burglary and destruction of property (or even murder + assault when committing these), DO NOT LEND themselves to profiling, because the resulting crime scene reveals VERY LITTLE about the offencer. Therefore, it is only a LIMITED APPROACH to identifying a criminal.
C) So, it does have its advantages, but can’t be applied to a wide range of crimes.
A03) Top down approach
Counter point to the point above:
Supports A01) Wider application
P) However, a contrast point to this, is the strength of the top down approach, as it can be adapted to other crimes.
E) For example, Meketa (2017) reported that a top-down approach has been recently applied to BURGLARY, leading to an 85% rise in SOLVED CASES in 3 US states.
C) The organised/disorganised distinction was kept, but TWO NEW CATEGORIES were added: interpersonal (victim + burglar knew each other) and opportunistic (young, inexperienced criminals).
C) This suggests that top down profiling has a WIDER APPLICATION than was originally assumed.
A03) Top down approach
Supports A01) Research support - Canter (2004)
P) Supporting research for a DISTINCT ORGANISED CATEGORY of offender.
E) Canter (2004) –> Did an analysis of 100 US murders by different serial killers, using a technique called SMALLEST SPACE ANALYSIS. This is a STATISTICAL TECHNIQUE, that identifies correlations across different samples of behaviour. He used this to assess whether there were characteristics, such as torture and attempts to conceal the murder weapon.
C) The analysis demonstrated that there was a SUBSET of FEATURES of many serial killings, that matched the FBI typology for OO.
C) This increases the validity for the pre-existing template used to classify criminals.
A03) Top down approach
Challenges A01) Not mutually exclusive
P) Limitation –> “Organised” and “Disorganised” types may not be two distinct categories.
E) For example –> A killer may have high levels of sexual competence or intelligence, but might then commit a spontaneous murder, as found by Godwin (2002). He found that it’s therefore difficult to classify killers as one or the other type, as an offender may have MULTIPLE CONTRASTING characteristics.
C) This cannot be categorised into either of the two.
C) This could therefore mean that the typology approach is more of a CONTINUUM, rather than one or another, which LOWERS ITS VALIDITY.
A03) Top down approach
Weakness of RM)
P) Weakness –> The original data on which the organised/disorganised classification comes from, as it’s based on 36 of the MOST DANGEROUS/ SEXUALLY MOTIVATED murderers eg. Bundy + Manson.
E) Self report data was used to identify the key characteristics, that would help police “read” a crime scene.
C) This means that self-report methods question the validity of the classification system, as individuals are HIGHLY MANIPULATIVE, so not likely to be the best source of reliable info. Additionally, their RATIONALE might be quite different to more typical offenders.
C) Therefore, the use of self-report methods lowers the internal validity of the classification system.
Bottom Up Approach
Profilers work up from evidence collected from the crime scene, to develop hypotheses about the likely characteristics, motivations and social backgrounds of the offender.
Bottom up approach info
- Developed in the UK, as a more data-driven approach is taken.
- Aims to generate a picture of the offender, their likely characteristics, routine behaviour and social background.
- This is completed through systematic analysis of evidence at the crime scene.
- Unlike the top down approach, it DOES NOT begin with fixed typologies. The investigator engages in deeper and more rigorous scrutiny of the details of the offence.
- It is more ground in psychological theory.
- The approach starts with the details and creates the bigger picture.
Investigative psychology
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.
Investigative psychology
An attempt to apply statistical procedures, alongside psychological theory, to the analysis of crime scene evidence. Specific details are used.
The aim is to establish patterns of behaviour, that are likely to occur ACROSS crime scenes. This is to develop a statistical database, which acts as a baseline comparison.
Approach is mostly associated with Prof David Canter. The main focus of investigative psychology is assessment of the crime scene, to analyse BEHAVIOUR AND SOCIAL INTERACTIONS between the OFFENDER and VICTIM.
Canter’s (1994) Key psychological principles
They inform and assist the profiling process.
Interpersonal coherence - The way an offender behaves at the scene of the crime + how they interact with the victim. This may reflect how they interact in a day to day situation.
Time and Place - Could indicate something about where they live or work or where they are geographically comfortable.
Forensic Awareness - Behaviour could indicate that they have been involved with the police in the past eg. how good they are at covering their tracks or lying to the police.
Two features emerge from these principles, that help see if crimes are committed by same offender.
- Offender consistency hypothesis –> Whether the offender has behaved in the same way each time they commit a crime.
- Behavioural distinctiveness –> Known as the criminal’s signature.
Geographical profiling
Based on the principle of SPATIAL CONSISTENCY: that an offender’s operational base and possible future offences, are revealed by the geographical location of previous crimes.
Geographical profiling
Spatial consistency - Suggests that serial offenders will restrict their work to geographical areas that they are FAMILIAR with.
Least effort principle - Offenders are more likely to commit a crime near where they live or habitually travel to, bcus it requires the least amount of effort.
Geographical profilers are concerned with WHERE, rather than who. The focus of this method is to try to establish how the LOCATION of a crime scene, can provide VITAL CLUES about the offender.
It tries to predict key profile information, such as the most likely area the offender would live, work, socialise and travel in. Info about any of these would help police narrow down the suspects + centre of inquiry.
Circle Theory - Canter + Larkin, 1993
Suggests that the pattern of offending often forms a CIRCLE around the offender’s HOME or BASE OF OPERATIONS.
Marauder - Operates in close proximity to their home base, but the crimes are often more spread out.
Commuter - Travel a distance away from their usual residence, but the crimes are usually closer together.
Crime mapping allows educated guesses to be made, about where the offender is likely to strike next. This is known as the JEOPARDY SURFACE.
A03) Bottom up approach
Supports A01) Investigative psychology
P) One strength of investigative psychology is that evidence supports its use.
E) Canter + Heritage (1990) –> Conducted an analysis of 66 sexual assault cases. Data was examined using smallest space analysis and several behaviours were identified as common in samples of behaviour, such as impersonal lang + lack of reaction to the victim.
E) Each individual displayed a characteristic pattern of such behaviours and this can help establish whether two or more offences were committed by the SAME PERSON.
L) This supports one of the basic principles of investigative psychology, that people are consistent in their behaviour, so characteristics can be applied when profiling.