U.S. District Judge Beryl Howell issued a preliminary injunction blocking the Donald Trump administration from conducting immigration arrests in Washington, D.C., without warrants or probable cause.The order requires Department of Homeland Security agents to document warrantless arrests and mandates administrative warrants unless probable cause of unlawful presence and likely flight exists.Recent reports and a video of an American citizen detained by immigration agents have increased concern over identity checks and aggressive enforcement targeting individuals without criminal records.