Likelihood of Arrest for Robberies, Assaults, and Sexual Offenses Committed by Group and Lone Offenders.

Many criminologists have considered the role of groups in the commission of crime to gain insight into offender decision-making. Additional research is needed, however, that examines the likelihood of arrest as a function of whether an offense is committed by a group of offenders (two or more offenders in a criminal incident) or a lone offender, as well as the number of offenders in the group. Using 3 years of data from the National Incident-Based Reporting System for robbery incidents, assault incidents, and sexual offenses, the study finds that the relative likelihood of arrest for group-offender incidents, compared with lone-offender incidents, varies by incident type.