ICE is acting under federal immigration statutes and delegated DHS authority: the Immigration and Nationality Act as enforced by DHS (8 U.S.C. §1103), which charges the Secretary of Homeland Security with immigration administration; 8 U.S.C. §1357, which grants immigration officers arrest/interrogation/search powers; and statutes governing detention and removal (e.g., 8 U.S.C. §§1226 and 1231). ICE’s Enforcement and Removal Operations (ERO) executes those arrests and removals. (See DHS release.)