Forensic Flashcards
Top Down Approach
A01
Developed by FBI in 1970s based on interviews with 36 sexually motivated murderers
Designates offenders as organised or disorganised
Signature of MO correlates with characteristics of offender
Top Down Approach
Steps
A01
- Data assimilation
- Classification of crime scene
- Crime reconstruction
- Profile generation
Top Down Approach
Organised
A01
Crime scene
* planned
* victim type
* self control
Offender
* above average IQ
* skilled profession
* married
Top Down Approach
Disorganised
A01
Crime scene
* spontaneous
* leaves clues
* no self control
Offender
* below average IQ
* unskilled profession
* lives alone
Top Down Approach
A03
- Effectiveness stats (mixed support)
- Development issues
- Application
- Organised and Disorganised
Bottom Up Approach
Developed in the UK in the 80s and builds a picture of offender through analysis of the evidence
Geographic profiling
Investigative psychology
Bottom Up Approach
Geographic Profiling
A01
Uses information about the location of linked crimes to make inferences about:
* location
* employment status
* mode of transport
Marauders commit crime in a circle around their base
Commuters commute
Bottom Up Approach
Investigative Psychology
A01
Uses a statistical database to link crimes and to determine possible traits of offender based on the traits of similar offenders
* interpersonal coherance
* forensic awareness
Bottom Up Approach
A03
- Marauders (data analysis)
- Scientific
- Issues with data base (data from police, unsolved crimes)
Atavistic Form
A01
Lombroso
Criminals are genetic throwbacks and cannot adapt to civilisation. Criminals are biologically different
Tested this with his Italian Offender research and found 40% had atavistic characteristics
Atavistic Form
Traits of Criminals and Murders
A01
Criminals
* asymmetrical face
* extra digits or nipples
* dark skin
Murderers
* bloodshot eyes
* curly hair
* long ears
Atavistic Form
A03
- Positive contributions
- Negative contributions
- Issues with Italian Offender research
- Can’t replicate
Biological Explanation
Genetics
A01
Twin studies - 35% concordance
* MAOA gene regulates serotonin
* CDH13 makes you more impulsive
Diathesis stress
Biological Explanations
Neural
A01
Raine
* 11% reduction in grey matter in prefrontal cortex for APD group
* Reduced autonomic response in stressful condition for APD
Low serotonin linked to low levels of self control and impulsivity
Biological Explanation
A03
- Twin studies aren’t proof, adoption are
- Types of crime
- RWA SSRIs for rehabilitation
- Support for role of prefrontal cortex