Top down approach Bottom-up approach
The American approach British Approach
in associated
originated
-
1970s FBI with Davi d Canter
-
by .
-from d a t a gathered by indepth interviews -generated by making inferences from systematic
With 36 sexually motivated serial using
killers
. analysis of evidence at the crime scene knowledge
match what is crime to theories a n d statistical analysis
.
-
k n ow n about a a of psychological
Pre-existing template.
creation TWO Types
of hypotheses of
Probable characteristics
1
Types of offender :
.
Investigative psychology
↑ .
2 Geographical profiling
Psychological theory
Organised :
Disorganised : a n d st a t i st i c a l
analysis
>
-
s h ow evidence >
-
↑
of
planning little >
-
ev i d e n c e of
planning no fixed typologies l i ke USA
Analysis of the crime >
-
victim is Crime
>
-
>
-
deliberate scene ten ds to re f l e c t profile is data d r i ve n
evidence .
>
-
impulsivity/spontaneous
.
little evidence left at scene
>
-
1. investigative psychology
History of failed relationships
surgical precision
>
-
Detached
S >
Interpersonal
significance criminal criminal forensic
Stages of Top d ow n
profiling
Coherence
Offender of time and characteristics Career awareness
↳ benaviour of
Place
↳
placed into ↳ criminal ↳ knowledge
Data assimilation categories experience CJS .
↳
may indicate
location
↳
infor mation gathered about
exactly what happened
Crime scene classification
↳ either
regarded organised .
2 Geographical
as
or
disorganised
.
profiling
Crime reconstruction
Rossmo/1997) :
↳
hypothesis generating what is likely to have
happened
.
-based on
principle of spatial consistency ,
that an
offenders operational
Profile base
generation and future offenses a re linked
.
↳
rough s ke t c h of criminal developed including social crime
mapping map local crime statistics Assumption that serial
-
used to ,
k i l l e rs re s t r i c t their wo r k to a re a s they a re familiar with
.
groups , appearance and likely behavioural traits .
Circle theory :
Marauders and commuters
Marauders -
offenders operate in close proximity t o home base
.
commuters -
offenders t r ave l a distance away from residence .
↳
people operate within a limited spatial mindset that c re a te s Imagined
boundaries in which crimes a re
likely to be .
committed
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