Forensics (definitions) Flashcards
Dark figure
The difference between the number of crimes committed and the number of crimes recorded by police
Official statistics
Figures based on the number of crimes that are reported to and recorded by police
Victim surveys
A questionnaire that asks a random sample of people whether they have been victims of crime over the past year and whether they have reported said crimes
Offender surveys
A self-report method that requires likely offenders to record all the crimes they have committed over a specified period of time
Offender profiling
A tool used to help investigators narrow the list of likely suspects when solving a crime
The top-down approach
The US method (a.k.a. the typology method) involving matching what is known about the crime and offender to a pre-existing template - either organised or disorganised
Organised offender
An offender who plans their crime, maintains a high level of control during it, leaves little evidence behind, and is intelligent, sexually and socially competent, in a skilled profession, and often married with children.
Disorganised offender
An offender who commits spontaneous crime, with little control, usually leaving evidence and the body at the scene, and is unintelligent, in unskilled employment, with a history of failed relationships, and often living alone
The bottom-up approach
The UK method involving using evidence from the crime scene to develop a data-driven profile of the offender
Investigative psychology
A form of bottom-up profiling that matches evidence from the crime scene to statistical analysis of offending behaviour to reveal important details about the offender
Inter personal coherence
The idea that the criminal behaves in a similar way during the crime as they do in more everyday situations, including how they interact with the victim
Forensic awareness
The extent to which the criminal is aware of investigative procedures and tries to ‘cover their tracks’, resulting from being the subject of police interrogation previously
Geographical profiling
A form of bottom-up profiling based on the idea that the location of an offender’s base and future crimes can be revealed by the location of their previous crimes
Jeopardy surface
A calculated area in which is it likely that the offender lives/will strike next
The marauder
An offender who commits crime in close proximity to their own home
The commuter
An offender who travels to commit crime far away from their own home
Least effort principle
The idea that crimes will be committed where it involves the least effort to get to them
Distance decay
The idea that crimes decrease in frequency the further the offender travels from their home
Buffer zone
The idea that a criminal will operate outside of a ‘buffer zone’ around their home to avoid being recognised