From the Overview: "This report summarizes U.S. Immigration and Customs Enforcement (ICE) Enforcement and Removal Operations (ERO) activities in Fiscal Year (FY) 2018. ERO identifies, arrests, and removes aliens who present a danger to national security or a threat to public safety, or who otherwise undermine border control and the integrity of the U.S. immigration system. ICE shares responsibility for administering and enforcing the nation's immigration laws with U.S. Customs and Border Protection (CBP) and U.S. Citizenship and Immigration Services."
U.S. Immigration and Customs Enforcement: https://www.ice.gov/