Forensics Flashcards
(152 cards)
What is the aim of top-down profiling?
Narrow the field of enquiry and list of likely suspects
How was top down profiling developed?
Hunt for the mad bomber who evaded capture of 16 years in the 40s and 50s
James Brussel drew an incredibly detailed picure which was accurate
What did James Brussel do?
Drew an incredibly detailed picture of the mad bomber, claiming he was an unmarried man, wearing a double-breasted suit
What is the top-down approach based on>
interviews with 36 of convicted sexual killers, including Ted Bundy and John Wayne Gacy
How does top down profiling sort information?
Organised and disorganised crime
Meketa study - top down profiling
looked at robberies
85% increase in solving crime using top-down approach
What are weaknesses of top-down profiling?
Not generalisable
Homology problem
Narrow field of offenders - ignoring possible suspects
Who developed bottom up profiling?
David Canter
What is the aim of bottom up profiling?
Generate a profule of the offender by looking at available evidence
Interpersonal Coherence
Behaviour in crimes reflects behaviour in real life
Forensic awareness
How much the offender has attempted to cover their tracks - indicates whether they have been questioned about crime in the past
What are the 2 ways of profiling in bottom up profiling?
Investigative Psychology
Geographic profiling
What are the two types of offenders in geographic profiling?
The Marauder
Then commuter
What is the Marauder?
Operates in close proximity to their base
The commuter
Travels a distance from their base
Canter and Heritage - SA
Found that when looking at sexual assault, the nature of offence was correlated with particular types of behaviour
This suggests that statistical techniques can be useful in identifying behaviour oatterns, supporting invstigative psychology
Lundrigan and Cantor
120 murder case involving serial killers, they disposed of bodies in various locations, forming a ‘centre of gravity’
Their base was located in the middle of this
Why are bottom up appraoches argued to be more scientific than top down?
Just the available evidence are used to create a profile, rather than attempting to fit offenders to pre-existing templates
Stages if the bottom up approach
- analysis of crime scene evidenc
- psychological theory and statistical analysis
- Creation of hypotheses of the probable characteristics of the offender
Railway Rapist
1975-86
23 women raped around London railway stations
Who was Lombroso?
The father of criminology
What did Lombroso suggest about criminals?
Criminals are genetic throwbacks, a primitive species who are biologically different to non-criminals
Savage, untamed - impossible to adjust to the demands of civilised society so turn to crime
How did Lombroso view offending behaviour?
Natural tendency, rooted in genes
Offending is innate, so criminals could not be blamed for their actions
What did Lombroso study?
The facial and cranial features of:
383 dead convicts
3839 living convicts