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Immigration Arrests in the Interior of the

United States: A Brief Primer



November 14, 2019

U.S. Immigration and Customs Enforceennt (ICE), a component of the Department of Homeland
Security (DHS), is primarily responsible for immigration enforcement in the interior of the United States.
ICE has substantial authority to arrest and detain non-U.S. nationals (aliens) identified for removal
because of immigration violations. In recent years, there has been a marked increase in arrests and
removals conducted by ICE. Sometimes these arrests have been conducted as part of large-scale sweeps
or raids involing the arrest of hundreds of individuals. These large-scale enforcement actions have
prompted complaints by some that they instill panic and fear in immigrant communities, along with
criticism that they may lead to separation of U.S  citizen children from their unlawfully present alien
parents. In response, ICE asserts that it does not conduct raids indiscriminately, but targets those who
have criminal charges or shown blatant disregard for U.S. immigration laws. The agency also argucs
that these enforcement actions are safely executed and deter future immigration law violations. This Legal
Sidebar provides an overview of ICE's power to conduct arrests and other enforcement actions.

ICE's   General Authority to Arrest and Detain

ICE was established following the creation of DHS in 2003. The agency's stated mission is to protect
America from the cross-border crime and illegal immigration that threaten national security and public
safety. ICE officers' authority to arrest aliens believed to have committed immigration violations derives
primarily from two federal statutes: Sections 236 and 287 of the Immigration and Nationality Act (INA).
INA § 236(a) provides that an immigration officer may arrest and detain an alien who is subject to
removal upon issuance of a Warrant for A rrest of Ailen. This administrative arrest warrant (ICE
Warrant) may be issued with a Notice to Appear (NTA), the charging document that initiates formal
removal proceedings, or at any time thereafter and up to the time removal proceedings are completed.
DHS  regulations provide that the ICE warrant may be issued only by certain designated immigration
officials (e.g., a supervisory officer). In addition, an ICE warrant is issued exclusively for use by
immigration officers. Reviewing courts have recognized that this administrative warrant may not serve as
the basis for state or local law enforcement officials to arrest and detain an alien, except when done under
the terms of a cooperative agreement with federal authorities under INA § 287(g).


                                                                  Congressional Research Service
                                                                    https://crsreports.congress.gov
                                                                                       LSB10362

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