Forensic Psych Flashcards
Offender profiling:
Building up a picture of a criminal based upon evidence from the crime scene/s, also known as typology.
Top-down criminal profiling:
Coming up with the big picture and then finding evidence to support it.
Bottom-up criminal profiling:
Finding little pieces of information and using it to build the picture.
Who came up with the theory of ‘organised’ and ‘disorganised’ killers?
Hazelwood and Douglas (1980)
Organised offender qualities:
-Lead an orderly life and will kill after experiencing a critical event in their life.
-Planning and control. This can be seen if they have brought
restraints to the scene and a weapon.
-Often leaving few clues.
-More likely to use a verbal approach with victims, talking them into a car or venerable position.
-Likely to be of high or
above average intelligence, socially & sexually competent
-Likely to be employed.
-May be married and have children
Disorganised offender qualities:
-Likely to have committed the crime in the heat of the moment.
-No pre-planning or thought, this will be shown by they use of items already at the scene.
-They may have left blood, semen, fingerprints and the murder weapon behind.
-Lower IQ ,impulsive and socially
incompetent, tending to live alone having a history of sexual dysfunction and failed relationships.
-Tend to be unskilled workers or unemployed.
-Often live relativity close to the murder site.
4 Main stages to the construction of an FBI profile:
- Data assimilation- reviews evidence
- Crime scene classification- organised or dis
- Crime reconstruction- hypothesise the sequence of events.
- Profile generation- create a hypotheses related to all aspects of the offender and their life.
Douglas’s explanation for a mixture of offender types at a crime scene:
-More than one offender
-An escalation of situation
-Actions of victim forcing a change in approach.
Criticism of Hazelwood and Douglas’ offender types-
Limited sample:
- Original sample was very limited, 36 US killers, 25 of them were the rarest type, a serial killer ( killed more than 3 people) Canter also points out that data self report, which is not very reliable.
Criticism of Hazelwood and Douglas’ offender types-
Limited explanation:
- Only a very limited range of crimes are suitable for this type of profiling, ie repeated successful murders whom have no direct connection to the victims.
Criticism of Hazelwood and Douglas’ offender types-
Alison et al (2002)
The personality theory element is outdated and not inline with modern theories of personality, modern theories recognise the role of environmental factors and personal development and can better explain altering behaviour such as Duffy’s move from raping and ditching
to raping and killing. Showing profiling needs to be updated as frequently they come to lack validity due to the static nature of the profiling system.
Criticism of Hazelwood and Douglas’ offender types-
Canter et al (2004)
After review 100 murders
supported the organised category yet found that the disorganised was not supported, being far to diverse than allowed for a single category.
Support of Hazelwood and Douglas’ offender types-
This system is widely used and found to be effective.
Criticism of Hazelwood and Douglas’ offender types-
Holmes (1989)
The categories have been redefined by other researchers to be more precise, Visionary, Mission, hedonistic and Power/control types of killers.
Criticism of Hazelwood and Douglas’ offender types-
Keppel & Walter (1999)
Argue that we need to focus up the motivation of the killers to understand who they are and to apprehend them.
Investigative psychology:
An attempt to use psychological theory with statistics to create
a suitable profile for the offender based upon there actions which are matched against an existing database of statistical information which a baseline for comparison. This
enables the police to recognise if a series of events are connected in some way.
Interpersonal coherence:
Dwyer (2001) said a key part is the way the offender behaves/ how they interact with the victims. It may be reflected in how they interact with others in
normal everyday life.
Crime mapping:
Rossmo (1997) showed that by collecting the information about abduction sites, murder sites and dump sites, you could map an area of activity. This enables you to work out the operating area.
Modus operandi:
Defining the way in which they
work and carrying things out, often as they have been successful previously or the way they work in an area that they know and can use their familiarity with to their advantage.
Canter’s circle theory (1993) :
Suggests that there are 2 sorts of serial killers/ rapist in this case:
The Marauder – who operates in closer proximity to their own home.
The Commuter – who travels to the area to engage in there crime, often traveling some distance. .
Bottom-up support-
Canter and Heritage (1990):
66 case reviews, using content analysis program called
“Smallest space analysis” which identified correlations across the data on the behavioural
patterns of the offenders. This established that there are common characteristics, such as the use of impersonal language and lack of reaction to the suffer of the victim. This helps the police to understand the mind set of serial killers and thus to catch them quicker, supporting the bottom up theory by adding another piece to the jigsaw puzzle.
Bottom-up support-
Ludrigan and Canter (2001)
Supports geographical profiling:
Looked at 120 USA murder cases, revealing the behaviour to be consistent with the two categories. Showing the “centre of gravity” effect which is caused by their home base when looking at pick up and dump sites.
Bottom-up criticism-
Copson et al (1995):
found that despite it being deemed “ useful” in 83 % of cases it was in fact only
responsible for the correct identification in just 3% of those cases!
Crime:
An act committed in violation of the law where the consequence of conviction by a court is punishment, especially where the punishment is a serious one such as imprisonment.