Forensic Psychology Flashcards
The Problems in Defining Crime
Culture (where). Historical Context (when). Age (who).
Culture as a problem in defining crime
What is considered a crime in one culture may not be considered a crime in another. For example, in the UK it is illegal to have more than 1 wife, whereas in the Philippines this is legal.
Historical context as a problem in defining crime
What is considered a crime at 1 point in time may not be considered to be a crime at another. For example homosexuality in the UK is now legal whereas prior to 1967 it was an illegal offence.
Age as a problem in defining crime
At what age are people responsible for criminal actions? For example a 2 year old child should not be prosecuted for picking up a packet of sweets and walking out of a shop without paying for them. In the UK the age of criminal responsibility is 10 years.
Ways of measuring crime
Official Statistics. Victim Surveys. Offender Surveys.
Official Statistics
Government records of the total no. of crimes reported to police and recorded in the official figures. These are published by the home office every year. Allows the govt to develop crime prevention strategies and policing initiatives as well as to direct resources to those areas most in need. Officially recorded crime is affected by police recording rules which can vary between police forces.
Reasons why crimes are not reported
There is no victim. Too trivial. Can’t be bothered to. Mistrust police. Perpetrator is friend/family.
Reasons why crimes are not recorded.
Insufficient time. Crime too trivial. Not a priority. Victim withdraws charge. Lack of evidence. police recording rules.
Research on recording crime
Farrington and Dowds 1985 - Found that Nottinghamshire police were more likely to record thefts of less than £10 value in contrast to Staffordshire and Leicestershire police forces.
Victim Surveys
Record people’s experience of crime over a specific period. The Crime Survey for England and Wales asks people to document the crimes they have been a victim of in the past year. Each person is interviewed using a fixed set of questions. 50,000 households are randomly selected. Published on an annual basis.
Offender surveys
Involves individuals volunteering the details of the no. and types of crimes they have committed. These tend to target specific groups of likely offenders based on ‘risk’ factors such as previous convictions, age social background etc. The Offender Crime and Justice Survey which ran from 2003-6 was the 1st national self-report offender survey in the UK. As well as measuring offending, it looked at indicators of repeat offending, trends in offending, role of co-offenders. The OCJS involved interviewing 10-25 year olds about anti-social behaviour and drug use in a longitudinal study.
Evaluation of Official Statistics
Practical Application - Allows govt to direct resources to tackling specific crime in certain areas. Not reliable figures - Only shows those crimes that are recorded, People may not report crimes.
Evaluation of Victim Surveys
Reliance on memory - as seen in memory topic, EWT is not very accurate. More Accurate than official statistics - Highlights crimes that are not reported to the police.
Evaluation of Offender Surveys
How many people - Offer insight into the no. of people responsible for certain offences as a small group or single individual may have committed many crimes. Unreliable - Individuals may conceal crimes they have committed or exaggerate them for bravado. Targeted nature of the survey means that types of crimes such as burglary are over represented as opposed to corporate crime such as fraud.
Offender profiling
A method of working out the characteristics of an offender by examining the characteristics of the crime and crime scene. Aim is to generate hypotheses about the probable characteristics of an offender.
The different approaches to offender profiling
UK = Bottom up US = Top down.
The Top-down Approach
Concerns matching what is known about the offence and offender to a pre-existing template. Originated in the US as a result of the FBI’s interviews with 36 sexually motivated serial-killers. Offenders are classified in one of two categories.
Categories of the top-down approach.
Organised. Disorganised.Based on the idea that serious offenders have a certain modus operandi which correlate with a particular set of social and psychological characteristics that relate to the individual.
Crime Scene Characteristics of an Organised offender
Evidence of planning. Victim is a stranger. Controlled conversation. Use of restraints. Removes weapon from the scene. Body is hidden.
Likely personality and behaviour of an Organised Offender
Average to high intelligence. Socially competent. Skilled employment. Sexually competent. Living with partner.
Crime Scene Characteristics of an Disorganised offender
Little to no evidence of planning. Victim is known. Little conversation. Leaves evidence - blood, semen etc. Little use of restraint. Body in open view.
Likely personality and behaviour of a Disorganised offender.
Below average intelligence. Socially inadequate. Unskilled employment. Sexually incompetent. Lives alone and close to crime scene.
4 main stages to constructing an FBI Profile
Data Assimilation - Profiler reviews evidence. Crime scene classification. Crime reconstruction - hypotheses in terms of sequence of events, behaviour of the victim etc. Profile generation - hypotheses related to the likely offender.
Research on Top-Down Approach
Canter 2004. Used info from 100 murders by 100 Serial Killers in the USA. Statistical technique ‘smallest space analysis’ was used to test for the co-occurrence of the 39 variables that distinguish between organised and disorganised. Found that organised characteristics were typical of most serial killers. Disorganised characteristics were much rarer and not frequent enough to be considered a type.
Evaluation of Top-down Approach
Evidence of Canter 2004 contradicts ‘disorganised offender’. Only applies to certain crimes such as torture and rape. Whilst these are high priority, they are not frequent. Scherer and Jarvis 2014 - It has other benefits such as opening up new avenues for police. Subjective in classifying crime scenes. Not enough categories.
The Bottom-Up Approach
Aim is to generate a picture of the offender - their likely characteristics, behaviour and social background. Done through systematic analysis of evidence at the crime scene. The profile is data driven. Does not begin with fixed typologies.
Investigative Psychology
Smallest Space Analysis. Interpersonal Coherence. Forensic Awareness.
Smallest space analysis
A computer program that identifies correlations across patterns of crime scenes. Uses data bases for details of crimes, for example the MO, location etc. Specific details of an offence can then be matched against the database.
Interpersonal Coherence
Central to the bottom-up approach. This is the way the offender behaves at the scene, including how they interact with the victim. May reflect their behaviour in more everyday situations. For example, whilst some rapists want to maintain maximum control and humiliate their victims, others are more apologetic.
Forensic Awareness
Describes those individuals who have been the subject of police interrogation before. Their behaviour may denote how mindful they are of covering their tracks.
Research on Investigative Psychology
Canter and Heritage (1990). Content analysis of 66 sexual assault cases. Data examines using Smallest space analysis. Several characteristics were identified as common in most cases, such as use of impersonal language and lack of reaction to the victim. This can help establish whether 2 or more offences were committed by the same person.
Research into accuracy of Profiles
Pinizzotto and Finkel 1990. Compared 5 groups of people’s ability to write a profile of a murder and sex offence. Expert profilers were most accurate at producing profiles of the sex offender. However, detectives with no profiling experience were more accurate in profiling the murderer.
Geographical Profiling
Canter proposed that people do no just reveal themselves through the crimes they commit but also the locations they choose. Concerned with where rather than who. Offenders are more likely to commit a crime close to their house or where they habitually travel to because they now the area best. Analyses the locations of a connected serie of crimes and considers where the crimes were committed, the spatial relationships between different scenes and how they may relate to the offenders home.
Geographical Profiling - Circle Theory
Canter and Larkin 1993 proposed that most offenders have a spatial mindset, they commit their crimes within a kind of imagined circle. There are Marauders and Commuters.
Marauder
The Offender’s home is within the geographical area in which the crimes are committed.
Commuter
The offender travels to another area and commits crimes within a defined space (circle).
Research on Geographical Profiling
Lundrigan and Canter 2011. Found that the offenders home was geographically central in the pattern. The location of each body disposal site tended to be different each time. This effect was most evident for offenders who travelled short distances.
Criminal Geographic Targeting
Computerised system developed by Rossmo and Rossmo’s formula. The formula produces a 3D map displaying spatial data related to time, distance and movement to and from crime scenes. The map is called a jeopardy surface and indicates where the offender is likely to strike next
Evaluation of bottom-up approach
More objective and scientific than the top down approach. Geographic profiling can help to narrow down search areas. However, geographic profiling cannot distinguish between multiple offenders in the same area. Human error could occur when inputting data to databases. Rachel Nickell Murder highlights over reliance on profilers being dangerous.
Bio Explanation - Atavistic Form
Lombroso (1876) proposed that offenders were a biologically distinct group of people exhibiting primitive characteristics. They were a separate species whose features enabled them to survive in the wild, but made them ill suited to civilised society. Criinals are born not made.
Lombroso’s criminal characteristics
Large Jaws. Narrow sloping brow. High cheekbones. Large Ears. Extra Nipples. Dark Skin.
Lombroso’s Head Shape/Facial Features Theory
Argued that the shape of the head and the facial features determined the criminal type. For example, a murderer would have long ears and fleshy lips whilst a fraudster would have thin lips.
Research on Atavistic Form
Lombroso based his theory on survey data of criminal heads and bodies. Sampled the proportions of 383 skulls of dead criminals and the heads of 3,800 living criminals. Concluded that approximately 40% of crimes could be attributed to the atavistic form.
Evaluation of Atavistic form
Contradictory Research of Goring 1913.- Criminal Characteristics can lead to prejudices, especially the ‘dark skin’ characteristic which could be used to justify racial persecution. Deterministic - If you are born with these characteristics you will be a criminal.
Goring (1913)
Compared 3,000 convicts with a group of non-convicts, Found no differences except for the fact that convicts were slightly smaller.
Bio Explanation - Genetic
The idea that one or more genes predispose individuals to criminal behaviour.
Twin Studies into Criminality
Lange 1929 - Found concordance rates of 77% for MZ twins and 12% for DZ twins, suggesting a partly genetic explanation. Christianson (1977) - Found concordance rates of 33% for MZ twins and 12% for DZ twins.