; and (ii) the smuggling into, and sale within, the United States of weapons; (I) investigate and refer for prosecution matters involving immigration benefits and document fraud; and (J) additional duties within the statutory authority of United States Immigration and Customs Enforcement as assigned or delegated by the Director. (g) Office of Enforcement and Removal Operations (1) In general There is established in United States Immigration and Customs Enforcement an 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) identify, arrest, detain, and seek the removal of aliens, and remove aliens ordered removed, who— (i) are inadmissible or deportable under section 212(a)(3) or 237(a)(4) of the Immigration and Nationality Act ( 8 U.S.C. 1182(a)(3) or 1227(a)(4)), or otherwise present a national security risk to the United States; (ii) are inadmissible or deportable under section 212(a)(2) or 237(a)(2) of the Immigration and Nationality Act ( 8 U.S.C. 1182(a)(2) or 1227(a)(2)); (iii) undermine the border security efforts and operations of the United States; (iv) enter the United States in violation of Federal law; (v) are unlawfully present in the United States; (vi) are members of a criminal gang or participate in gang-related crimes, except as described in subsection (f)(3); (vii) constitute threats to the public safety; or (viii) are otherwise subject to exclusion, deportation, or removal from the United States; (B) refer for prosecution aliens described in subparagraph (A) or section 922(g)(5) of title 18, United States Code