Lecture 4 part 2 Flashcards
Geographic profiling
- Technique used that involves analysis of crime scene location to determine most probably area of offender residence
- Assumes offenders do not travel long distance
Stuart Kind
- Called in as consultant to Yorkshire Ripper case
- Murder of girls and women occurring between 1975 and 1980
- First documented application of geographic profiling
Canter’s circle theory
- Based upon assumption that criminals will commit crime in places they know and not exactly where they live
- If all crimes fall within a circle then the offender will most likely reside in that circle
Assumptions behind geographic profiling
- Offender tends to live within Canter’s circle theory
- As distance from offender’s home increases, probability of them committing the crime decreases
- If giving options on locations, offender will choose the most convenient option (Least effort principle)
Cognitive mapping theory
Process by which people construct and use subjective mental representations of their surrounding geography
Buffer zone
Area close to offender’s home that they won’t commit any crimes in
Activity spaces
Area surrounding buffer zone that crimes will be committed
Awareness spaces
Area around activity spaces will crimes usually won’t be committed due to lower familiarity
Target selection theory
- Uses cognitive mapping to explain how offenders locate targets
- Offenders usually find targets by either becoming aware of them while moving through activity spaces or find targets by actively searching awareness area
Canter’s offence patterns: marauders
Commit crimes outward from their anchor point
Canter’s offence patterns: commuters
Commit crimes outside of normal activity spaces in an attempt to leave no geographical link
Criminal consistency hypothesis
- Assumes targets are more or less evenly distributed throughout space
- Works well in urban areas, not so well in rural areas
Incorrectly linked incidents
incorrectly linking incidents to an offender can corrupt geographical profile by confusing cognitive maps of multiple offenders