Forensics Flashcards
(100 cards)
What is the top down approach?
When profilers have pre-existing conceptual categories of offenders in their minds.
How does the top down approach work?
- There are pre-existing categories of organised and disorganised offenders
- Analysis of the crime, and the data is put into patterns.
- Categorisation of offender as organised/disorganised (crime assessment) and creation of hypothesis of the probable characteristics of the offender
What are the steps of top-down profiling?
- profiling inputs (description of the crime scene, info about victim, details of crime)
- decision process models (puts the data into patterns, e.g. location +time factors, type of murder)
- crime assessment (organised vs disorganised offender)
- criminal profile (hypothesis about the background of criminal, how the criminal may respond to investigative efforts)
- crime assessment (report is given to the investigators and people matching this are evaluated. If no suspect is identified then goes back to step 2)
- apprehension (effectively an evaluation to make sure everything was valid)
What significant thing did top-down profilers do?
Drew upon data gathered from in depth interviews with 36 sexually motivated serial killers e.g. ted bundy, Richard Ramirez
Give a brief overview of the bottom-up approach to profiling
The UK method involves using the objective evidence to predict things about the criminal (s), rather than using subjective methods like the FBI. It was developed by Canter who caught the ‘railway rapist’; his model is known as the five factor model.
What is Canter’s bottom up profiling method called?
The five factor model
What are the 5 steps of Canter’s five factor model?
Interpersonal coherence Time and place Criminal characteristics Criminal career Forensic awareness
What is interpersonal coherence? (bottom up)
Consistency between the way offenders interact with their victims and others in every day life
What is time and place? (bottom up)
The time and location of an offender’s crime will communicate something about their own place of residence/employment
What are criminal characteristics? (bottom up)
Characteristics about the offenders can help to classify them which helps investigations
What is criminal career? (bottom up)
Crimes tend to be committed in similar fashion by offenders and can provide indication of how their criminal activity will develop
What is forensic awareness? (bottom up)
Offenders who show an understanding of a police investigation are likely to have had previous encounters with the criminal justice system
What is the difference between a marauder criminal and a commuter criminal?
Marauder does local crime, commuter travels to commit their crime
What is the ativistic form theory?
An early biological explanation which proposed that criminals are a subspecies of genetic throwbacks that can conform to the rules of modern society. Such individuals are distinguishable by particular facial and cranial characteristics
What 2 criminologists are important when we consider the atavistic form?
Franz Gall proposed phreonology (the shape of your head corresponds to personality)
Cesare Lombroso- criminals are genetic throwbacks with atavistic features
What characteristics are criminals supposed to have?
Strong, prominent jaws
High cheekbones
Dark skin
Extra toes/nipples/figures
What characteristics are sexual deviants supposed to have?
Glinting eyes
Swollen, fleshy lips
What did Cesare Lombroso study and what were his findings?
He did a study of facial and cranial features of almost 4000 living and dead criminals in Italy which supported his theory. However, a lot of Africans were in Italian prisons because they migrated there and their characteristics fitted his e.g. dark skin
What was the idea of eugenics?
That genetically ‘unfit’ people should be prevented from breeding
What is an organised offender?
Planned and targeted victim, violent fantasies may be acted out. The offender is usually intelligent, and socially and sexually competent.
What is a disorganised offender?
Unplanned and random selection of the victim. The offender usually leaves evidence at the crime scene like blood, semen, fingerprints or the weapon.
What is geographical profiling?
Analyses locations and connections between crime scenes
What is circle theory?
Cantern proposed that most offenders have a spatial mindset, committing crimes within an imaginary circle. This explains marauders.
What is criminal geographic targeting?
A computerised system developed that has a formula which uses data about time, distance and movement and produces a map called a ‘jeopardy surface’ which shows likely closeness to the residence of the offender