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Justice Department Authorizes U.S. Military to Detain Migrants Near Border Defense Zones
Just the facts
The legal opinion, authored by Deputy Assistant Attorney General William Hyde, concludes that military personnel may arrest individuals who enter or immediately leave designated National Defense Areas without violating the Posse Comitatus Act. The second administration of President Donald Trump has established six such defense zones across Arizona, California, New Mexico, and Texas to assist federal law enforcement in curbing illegal border crossings. Under the framework, military service members can apprehend suspected trespassers on or adjacent to restricted land and transfer them to civilian law enforcement agencies. Since enforcement began in April 2025, federal prosecutors have charged hundreds of individuals with misdemeanor offenses for entering restricted military property.
Why this is news
The United States Department of Justice Office of Legal Counsel issued an official legal opinion granting military personnel broader authority to apprehend migrants accused of trespassing near designated defense areas along the U.S.-Mexico border.
Sources
This summary is compiled strictly from the original reporting below.