Marines deployed in Los Angeles temporarily detained a civilian at the Wilshire Federal Building, handing him over to Homeland Security—marking the first known detention by active-duty troops under Trump’s order. The troops, tasked with protecting federal property amid immigration protests, can only hold individuals briefly before transferring them to civilian police. While the military can't make arrests due to the Posse Comitatus Act, Trump could invoke the Insurrection Act to expand their role.
