Although there has been considerable variation in the application of expertise to offending populations, one aspect that is widely agreed upon is that expertise is best represented on a continuum from novice to expert. The present study, therefore, investigated criminal expertise in 877 hybrid offenses that involve sexual assault and robbery (i.e., sexual robbery) or burglary (i.e., sexual burglary). Specifically, we analyzed the crime-commission processes of both these offenses using latent class analyses to determine the heterogeneity of criminal expertise among each domain. Results showed an expert to novice continuum in both domains, including a “domain-specific” expert sexual burglary subgroup who was characterized by a high degree of offense-related competencies relevant to sexual burglary. We also found an expert subgroup in sexual robbery who had more general skills (i.e., overlapping expertise) relevant to violent offending. Implications for offender decision-making, treatment, and practice are discussed.

尽管将专业知识应用于犯罪人群方面存在相当大的差异，但普遍同意的一个方面是专业知识最好体现在从新手到专家的连续统一体上。因此，本研究调查了 877 起涉及性侵犯和抢劫（即性抢劫）或入室盗窃（即性入室盗窃）的混合犯罪的刑事专业知识。具体来说，我们使用潜在类别分析分析了这两种犯罪的犯罪实施过程，以确定每个领域之间犯罪专业知识的异质性。结果显示，这两个领域的专家到新手连续统一体，包括“特定领域”专家性盗窃亚组，其特点是与性盗窃相关的犯罪相关能力高度。我们还发现了一个性抢劫专家小组，他们拥有更多与暴力犯罪相关的一般技能（即重叠的专业知识）。讨论了对罪犯决策、治疗和实践的影响。