; and (D) carry out other duties and powers prescribed by the Director. (g) Office of Enforcement and Removal Operations (1) In general There is established in U.S. Immigration and Customs Enforcement the Office of Enforcement and Removal Operations. (2) Executive Associate Director There shall be at the head of the Office of Enforcement and Removal Operations an Executive Associate Director, who shall report to the Director. (3) Duties The Office of Enforcement and Removal Operations shall— (A) serve as the law enforcement office of U.S. Immigration and Customs Enforcement with primary responsibility to enforce the civil immigration and nationality laws of the United States, except to the extent that any other agency of the Federal Government has the responsibility or authority for so doing; (B) identify, locate, detain, and arrest aliens in custodial settings or at-large who may be subject to removal from the United States; (C) have custody (and the authority to release) over aliens detained for potential exclusion, deportation, or removal from the United States, manage the administrative immigration detention operations of U.S. Immigration and Customs Enforcement, and provide necessary and appropriate medical care and dental and mental health services to detained aliens in the custody of the agency; (D) plan, coordinate, and manage the execution of exclusion, deportation, and removal orders issued to aliens; (E) investigate and refer for prosecution any civil or criminal violation of the immigration laws or any offense described in section 287(a)(5) of the Immigration and Nationality Act ( 8 U.S.C. 1357(a)(5) )