Domestic Violence Cases: What Research Shows About Arrest and Dual Arrest Rates, describes the results of a comprehensive, nationwide study that examined the factors leading to arrests and dual arrests in domestic violence cases. Dual arrests occur when police cannot determine a primary offender and arrest both parties involved in an incident. This e-publication describes the study's outcomes and provides recommendations for police, policymakers, and other practitioners; to help them improve arrest policies and increase conviction rates in the future.