Criminal history of homicide offenders: a multi-dimensional analysis of criminal specialization

The purpose of this paper is to determine how offenses co-occur in the backgrounds of homicide offenders and if identified groups of offenses reflect an underlying theoretical construct or theme; and to determine if offenders specialize in thematically similar offenses.

The previous convictions of 122 single-victim homicide offenders were examined using smallest space analysis to identify groups of co-occurring offenses across offenders’ criminal histories.

The results showed a thematic distinction between violent vs instrumental offenses and 84 percent of offenders specialized in offenses within a single dominant theme, suggesting that the framework can differentiate the majority of offenders’ criminal backgrounds. Possible sub-themes were identified that could suggest further demarcation of the themes and provide a more refined framework that may be of even greater utility in differentiating offenders.

This study utilized data from a single American city that may affect generalizability of the findings. The exclusion of a timeline for prior offending precludes consideration of offending escalation.

The current study uses an alternative approach to conceptualize specialization according to how offenses co-occur in the backgrounds of homicide offenders. This approach is less restrictive than considering the offenses in isolation to one another and may be of greater utility in empirically derived offender profiling models. The thematic framework developed herein can act as a foundation for future studies.