The ‘Cross+check’ system: Integrating profiling approaches for police and security investigations

It is an investigative truism that “information is the lifeblood of an investigation.” Yet in many investigations police and security personnel fail to fully utilize the diverse range of different types of information readily available to them which can add significant value to an investigation. In effect, potentially useful information simply falls between the cracks in an investigation. In serious, complex and/or high profile crimes and security type terrorism threats, the risks of missing such informational gaps and cracks pose a very real and present danger. To address this “falling between the cracks” informational phenomenon the current author devised and developed a deliberate low-tech ‘Cross-Check’ system that the average investigator can be trained in to use on a daily basis without the need for expensive or sophisticated equipment. The C+C system teaches an investigator to think in a logically grounded and creatively systematic manner using different types of information about a crime or security problem. The core of the C+C system is its ability to bring together and focus on the interrelationships between four qualitatively different levels of information. The goal of the C+C system is to generate and then prioritize the investigative leads that logically flow out of systematically ‘cross+checking’ informational interrelationships in order not only to plan and manage an overall investigative strategy but also to develop leads into evidence. This paper presents the theoretical, conceptual, and operational frameworks of the C+C system as a knowledge management tool in relation to the integration of several police and security profiling approaches as well as illustrating its practical application with a case example of an arson investigation.