Sex trafficking is recognized as a national problem that inflicts serious harm on its victims, yet, legislative responses to trafficking vary depending on jurisdiction. Federal legislation considers youths who engage in commercial sex acts as trafficking victims. States, however, vary in the evidence required to prove a juvenile is a victim of sex trafficking, as opposed to an offender of prostitution. Using four years of data from the National Incident-Based Reporting System, we compared details of commercial sex incidents involving youths who were identified as trafficking victims or arrested as prostitutes. Beyond legislative differences, comparisons between cases are discussed to illuminate how state law enforcement officials legally classify these events involving adolescents (i.e., as victims or prostitutes). Further, we consider the policy implications of the findings.