The Nature of Expressiveness and Instrumentality in Homicide

Abstract

One of the main areas of concern regarding offender profiling has been the general lack of extensive empirical studies on the psychological processes underpinning this process. This study aimed to investigate the possibility of establishing a model of homicide behaviors that could be used as a basis for evaluating the scientific validity of offender profiling. A sample of 247 British single offender-single victim solved homicide cases was analyzed using a nonmetric multidimensional scaling procedure known as Smallest Space Analysis. The results indicated that homicide crime scenes could most readily be differentiated in terms of the expressive and instrumental role the victim had to the offender. The backgrounds of the offenders could similarly be differentiated by an expressive/instrumental thematic split. However, when these two elements were combined, there was a substantial mix between crime scene themes and themes of background characteristics. The results are discussed in terms of the validity of classifying homicide into a expressive/instrumental dichotomy and the implications this classification may have for offender profiling.