CAP aims to identify all foreign born nationals incarcerated in jails and prisons in the United States. This is accomplished by interviewing the foreign born national or screening the foreign born national’s biographical information. Enforcement and Removal Operations (ERO) tracks CAP paperwork regarding criminal aliens, the number of encountered criminal aliens, the number of issued detainers and the number of arrested criminal aliens. Although ERO initiates removal proceedings against criminal aliens through CAP, the criminal aliens may remain in prison or jail to complete criminal hearings or sentences. Also available in high definition.