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Forensic (Psychological explanations (Eysenck (Personality traits…
Forensic
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Offender profiling
Top-down approach
- Matches known evidence to pre-existing template.
- Used data from interviews with 36 sexually motivated serial killers, includes Ted Bundy.
Organised:
- Deliberately target victim.
- High control.
- Little evidence.
- Above average intelligence.
- Skilled, professional occupation.
- Socially & sexually competent.
- May be marries and or have children.
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Constructing profile:
- Data assimilation
- Crime scene classification (organised or disorganised).
- Crime reconstruction
- Profile generation
Disorganised:
- Poor planning.
- Little control.
- More evidence.
- Lower than average intelligence.
- Unskilled or unemployed.
- Sexual dysfunction & failed relationships.
- Live alone, close to location of offence.
Bottom-up approach
Investigative psychology
Interpersonal coherence: Behaviour at scene reflects everyday behaviour, e.g. How rapists treat victims may reveal everyday relationship with victim gender.
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Forensic awareness: Those who have been interrogated before, behaviour may show how mindful they are of covering tracks.
Geographical profiling reveals offender's 'center of gravity', likely to include offender's base.
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Biological explanations
Atavistic form
Assumptions:
- Criminal are genetic throwbacks that can't cope with demands of everyday society.
- Criminal subtypes have physiological markers that indicate types of crimes likely to commit.
Atavistic characteristics:
- Atavistic form: Narrow, sloping brow; strong, prominent jaw; high cheekbones & facial asymmetry.
- Dark skin
- Extra toes, nipples or fingers.
- Murderers: bloodshot eyes, curly hair, long ears.
- Sexual deviants: glinting eyes, swollen, fleshy lips, projecting ears.
- Fraudsters: thin & reedy lips.
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