Abstract
Following a series of armed robberies in Phoenix, Arizona, crime analysts assisted robbery investigators by providing predictions of where future crimes would occur and by determining where the offenders were likely to live. These assessments were based upon modelling offender behaviour within a geographical information system. The methodology was able to identify a prioritised number of future targets and a location for the offenders in relatively restricted geographical areas to support the ongoing investigation. While the robberies remain unsolved, geographical analysis proved to be useful both operationally for investigators and in obtaining support for the use of crime analysis in subsequent investigations. Practical problems such as lack of resources, poor communication with other jurisdictions and data access limitations have also begun to be addressed. It is concluded that further research on offender geographical behaviour is required in order to develop comprehensive tools for routine use by analysts and investigators.
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