Forensics Flashcards
What is Offender Profiling?
A behavioural and analytical tool that is intended to help investigators accurately predict and profile the characteristics of unknown criminals
When was Offender Profiling created?
The 1970s
Where uses the Top Down Approach?
America
How does the Top Down Approach work?
- Starts with the crime scene and the evidence there
- Uses pre-established typology to assign the criminal to one of two profiles based on witness reports and evidence
Why does the Top Down Approach work?
Criminals have ways of working that correlate with psychological and social characteristics.
The characteristics allow police to categorise criminals as either organised or disorganised.
Who suggested Organised and Disorganised types of criminals?
Hazelwood and Douglas
What are some key characteristics of Organised Criminals?
- Evidence of planning - weapon taken, little evidence left, body hidden, travel away from home
- Targets the victim - they either know the victim or have a particular type of victim
- Higher than average intelligence
- Social and sexual competence - usually married or have children
What are some key characteristics of Disorganised Criminals?
- Little/no evidence of planning - weapon found at scene, frenzied attack of rage, body left, evidence left, close to home
- Lower than average intelligence
- Low/no social or sexual competence - usually live alone
How many stages do the FBI have to construct a criminal profile?
4
What are the 4 stages of FBI criminal profile construction?
1) Data assimilation
2) Crime scene classification
3) Crime reconstruction
4) Profile generation
What is data assimilation?
Analysing the evidence at the crime scene and witness reports
What is Crime Scene Classification?
Classifying the crime as organised or disorganised
What is Crime Reconstruction?
Developing hypotheses about the sequence of events
What is Profile Generation?
Developing a hypothesis about the offender
Who is an example of an organised criminal?
Ted Bundy
How is Ted Bundy an Organised criminal?
- He was highly intelligent and excelled at law school
- He was charming showing social and sexual competence
- He had a type of victim - all brunette students with a middle parting - they looked like his ex girlfriend
- He travelled across 7 states to perform his crimes
- He had a set pattern of rape and murder by beating
- He left few clues and escaped capture for a long time
Evaluate the Top Down Approach of Criminal Profiling
Good - Top down profiling can be adapted to other kinds of crime such as burglary
- Critics claimed the approach only worked for extreme or serial crimes such as rape or murder
- However, reports have shown it has been applied to burglary and has had an 85% rise in solved cases in 3 US States
- It adds 2 new categories to organised and disorganised: Interpersonal (criminal knows the person and steals a valuable item)
Opportunistic (young, inexperienced offenders)
- This suggests a wider application
Bad - Based on Flawed evidence
- FBI profiling was created based on 36 interviews with serial killers and murderers
- Canter et al argued it was a small sample size that was not randomly selected and did not include different types of crimes
- The interviews were unstructured, so there was no standardised or comparable procedure
- This could mean the top down approach is not scientific so lacks validity
Bad - It may be difficult to classify a crime as only one
- There are a variety of combinations of organised and disorganised, and killers might have contrasting characteristics such as high intelligence but leaves the body at the scene
- This suggests organised/disorganised classification is more likely to be a continuum
Where uses the Bottom Up Approach?
The UK
What are the 2 types of Offender Profiling?
Top Up Approach (USA)
Bottom Down Approach (UK)
How does the Bottom- Up Approach work?
It works up from evidence collected at the crime scene to develop hypotheses about the likely characteristics, motivation, and social background of the offender
What is Investigative Psychology?
- A form of Bottom-Up profiling that matches details from the crime scene with statistical analysis of typical offender behaviour patterns that are based on psychological theory.
- Patterns of behaviour that occur across crime scenes are used to develop a statistical database which acts as a baseline for comparison
What does Investigative Psychology include?
Interpersonal Coherence
Significance of Time and Place
Forensic Awareness
What is Interpersonal Coherence?
The way the offender behaves at the scene
What is Significance of Time and Place?
An indicator of where the criminal lives