An immigration detainer is one of the key tools that Immigration and Customs Enforcement (ICE) uses to apprehend individuals who come in contact with local and state law enforcement agencies. Sometimes, after a defendant has been arrested for a crime, an ICE officer will file an immigration detainer (Department of Homeland Security form I-247A) with the agency that has custody of the defendant. The detainer asks the agency to notify ICE when the defendant would otherwise be eligible for release and to hold the defendant for up to 48 hours thereafter to enable ICE to take custody of the defendant.
My colleague Jeff Welty blogged about immigration detainers several years ago. Recently, my colleagues and I have received a lot of questions about the scope of judicial officials’ authority when navigating immigration detainers. This post answers some of those questions.